Games like Planets Under Attack on Steam

For those who prefer not to search, lists of the most played, top deals and best free games like Planets Under Attack are available at the bottom of the page.

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Star Ruler Take command of a vast interstellar empire and safeguard your species from total extinction in a procedurally generated 3D galaxy (with the option to flatten it) from 1 System to 10,000+! Prove your species' ingenuity through a deep and intricate combat system where anything (from individual components on ships to the stars themselves)...

Similarity 80%
Price -94% 0.42€
Rating 7.7
Release 20 Sep 2010
DG2: Defense Grid 2 Setting the bar as the definitive tower defense game, Defense Grid 2 introduces new worlds and threats to test your tower placement strategies. With a bold new look and the addition of new game modes, player-versus-player and multiplayer co-op, every play brings fun new opportunities and challenges.

Similarity 77%
Price -98% 0.26€
Rating 8.3
Release 23 Sep 2014
Interloper Interloper is an online multiplayer real-time strategy game with matches that take only 5 minutes. Instead of destroying your opponent, you win by claiming domain. By predicting your opponent's movements, you corner them to claim the entire map.

Similarity 76%
Price Free to play
Rating 7.9
Release 21 May 2015
Galcon 2: Galactic Conquest Galcon 2 is a demolition derby in space! Send swarms of ships from planet to planet to conquer the galaxy in this fast paced multiplayer strategy game!

Similarity 75%
Price Free to play
Rating 7.9
Release 05 Dec 2014
Aeon Command Aeon Command is a tug of war strategy game, where you play as one of three unique factions to help gain dominance over the Aeon Nebula! Take control of your mother ship to gather resources, produce ships and fight off the enemy mother ship. Grow stronger as you progress through the 24 mission campaign and unlock new upgrades.

Similarity 75%
Price 2.99€
Rating 7.4
Release 03 Jul 2014
Space Run Galaxy Space Run Galaxy is the sequel to Space Run, the game from one-man studio Passtech, which seduced hundreds of thousands of players with its dynamic and original gameplay. By twisting the tower-defense game style, Space Run offered an addictive real-time spaceship construction strategy experience.

Similarity 75%
Price -92% 0.84€
Rating 6.2
Release 17 Jun 2016
Solar Flux Travel across the universe and save dying suns from extinction in this unique and challenging puzzle strategy game. You are the last hope to bring salvation to a perishing universe as you collect and deliver fragments of plasma using your omni-directional ship.

Similarity 73%
Price -96% 0.48€
Rating 7.0
Release 24 Oct 2013
Out of Space Strategy co-op online multiplayer game about living on a spaceship with your roommates. You'll need to generate resources, take care of a deadly alien infestation, upgrade your appliances and build your sustainable space home. Living together is never easy, especially when you are in outer space!

Similarity 72%
Price -93% 0.89€
Rating 7.7
Release 26 Feb 2020
Planet S Planet S is a real-time strategy game where your goal is to colonize multiple planets in a solar system to advance your civilization, build a city and supply it to grow your faction.

Similarity 71%
Price Free to play
Rating 8.8
Release 28 Oct 2023
AI War: Fleet Command "You are outgunned. You are massively outnumbered. You must win." These are your orders. Humanity has already fought its war against the machines -- and lost. AI death squads stand watch over every planet and every wormhole, the few remaining human settlements are held captive in orbiting bubbles, and the AIs have turned their...

Similarity 71%
Price -95% 0.54€
Rating 7.9
Release 21 Oct 2009
SPACECOM SPACECOM – a strategic-to-the-bone, starfleet command game in which deception, smart movement, and choices to battle decide victory or defeat.

Similarity 71%
Price -98% 0.22€
Rating 6.6
Release 17 Sep 2014
Particle Fleet: Emergence Build and design your own fleets and stand opposed to the Particulate in this physics/strategy/RTS/fleet hybrid. Build partially destructible and self repairing ships that interact with enemies less controlled by some scripted logic and more driven by a real time massive physics particle simulation.

Similarity 71%
Price 14.99€
Rating 8.8
Release 29 Sep 2016
Istrolid In Istrolid you design your own unique spaceships from a large number of parts to fit your strategy and play style. With no set units or factions you are free to create a fleet where each ship has its own balanced strengths and weaknesses, from basic fighters and bombers to hulking battleships and speedy destroyers.

Similarity 70%
Price Free to play
Rating 8.4
Release 06 May 2016
Star Ruler 2 Massive scale 4X-RTS set in space. Control hundreds of planets, manipulate galactic politics, research numerous advanced technologies, and command thousands of units and hundreds of planets in your quest for galactic dominance.

Similarity 70%
Price 16.79€
Rating 7.7
Release 27 Mar 2015
Space Run Space Run is a «real-time spaceship construction strategy game». Space Run takes the well-known Tower Defense-style gameplay and twists it, challenging you to manage and protect a spaceship and its cargo against the hazards of deep space!

Similarity 70%
Price -91% 0.46€
Rating 8.2
Release 13 Jun 2014
8-Bit Hordes From the team that brought you 8-Bit Armies comes a new fantasy RTS as fast-paced and friendly as the original! 8-BIT HORDES is a colorful strategy-arcade game that is easy to learn for players of all skill levels. Collect resources, build up and defend your base, amass your army of orcs or humans and ultimately crush your opponents!

Similarity 69%
Price -85% 2.27€
Rating 7.7
Release 12 Aug 2016
Stars in Shadow Stars in Shadow is a turn-based 4X strategy game and a vivid tribute to the genre classics. Compete with alien factions to explore and colonize nearby starsystems, build fleets to defend against rivals, negotiate or conquer them. Win by unifying the galaxy, through diplomacy or force.

Similarity 69%
Price -97% 0.92€
Rating 7.5
Release 19 Jan 2017
Mushroom Wars 2 In Mushroom Wars 2, enemy tribes of feisty mushroom creatures face off in short but fierce RTS battles. Step into the shoes of a fearless Mushroom Commander, choose a hero to lead your army, and take control of the battlefield in a variety of multiplayer modes or challenging story campaign.

Similarity 69%
Price 14.99€
Rating 6.1
Release 06 Oct 2017
Interplanetary: Enhanced Edition In this turn-based strategic artillery game, players wage interplanetary wars by developing their home planets and firing massive barrages through the unpredictable gravity fields of the solar system.

Similarity 69%
Price -85% 2.24€
Rating 8.0
Release 02 Aug 2017
Halcyon 6: Starbase Commander Halcyon 6: Starbase Commander is a retro space strategy RPG with base building, deep tactical combat, crew management and emergent storytelling.

Similarity 68%
Price -96% 0.73€
Rating 8.0
Release 08 Sep 2016
Weird Worlds: Return to Infinite Space Weird Worlds: Return to Infinite Space is a hybrid roguelike game of space exploration, adventure and starship combat.

Similarity 68%
Price 3.99€
Rating 6.3
Release 19 Mar 2013
Nexus - The Jupiter Incident Ambitious megacorporations monopolize the conquest of space and the colonization of the solar system. At the very edge of the solar system, the companies make a discovery that will shift the technological advantage and upset the balance. And so a new conflict is born: "The Jupiter Incident."

Similarity 68%
Price 9.99€
Rating 8.2
Release 03 Jul 2007
War, the Game 'War, the Game' is a RTS for pc in realistic present day setting.The controls are intuitive, the game rules are simple and transparent.The game focuses on strategy and the use of ones brain to complete the scenarios.The map is a spherical version of earth. That's new.

Similarity 68%
Price -85% 1.07€
Rating 6.5
Release 12 Jan 2015
ENDLESS™ Space - Definitive Edition ENDLESS™ Space is a turn-based 4X strategy game, covering the space colonization age in the Endless universe, where you can control every aspect of your civilization as you strive for galactic domination.

Similarity 67%
Price 9.99€
Rating 7.9
Release 04 Jul 2012

Most played games like Planets Under Attack on Steam

Take a look at the top games like Planets Under Attack that are currently attracting the largest player bases on the Steam platform, as of June 15th 2025.

1. Stellaris

Similarity 56% Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities. Stellaris is a space, grand strategy and strategy game developed by Paradox Development Studio and published by Paradox Interactive. Released on May 09th 2016 has received 185,433 reviews of which 159,527 were positive and 25,906 were negative resulting in a rating of 8.5 out of 10. The game has hit the top spot as the #1 most played game like Planets Under Attack, thanks to its 13,727 peak concurrent players over the last day.
8.5
159,527
25,906

13,727
players

2. STAR WARS™ Empire at War - Gold Pack

Similarity 65% Command or corrupt an entire galaxy in the definitive Star Wars strategy collection. It is a time of galactic civil war. Will you take up the reins of the Rebellion, assume control of the Empire, or rule the Star Wars Underworld? STAR WARS™ Empire at War - Gold Pack is a strategy, rts and space game developed by Petroglyph and published by LucasArts, Lucasfilm and Disney. Released on May 25th 2010 has received 39,435 reviews of which 38,503 were positive and 932 were negative resulting in an impressive rating of 9.6 out of 10. While seeing 2,818 players online at once in the last 24 hours, this game is currently ranked #2 among games like Planets Under Attack based on player count.
9.6
38,503
932

2,818
players

3. FTL: Faster Than Light

Similarity 63% This "spaceship simulation roguelike-like" allows you to take your ship and crew on an adventure through a randomly generated galaxy filled with glory and bitter defeat. FTL: Faster Than Light is a rogue-like, space and strategy game developed and published by Subset Games. Released on September 14th 2012 has received 75,052 reviews of which 71,561 were positive and 3,491 were negative resulting in an impressive rating of 9.4 out of 10. While seeing 1,566 players online at once in the last 24 hours, this game is currently ranked #3 among games like Planets Under Attack based on player count.
9.4
71,561
3,491

1,566
players

4. Plague Inc: Evolved

Similarity 56% Plague Inc: Evolved is a unique mix of high strategy and terrifyingly realistic simulation. Your pathogen has just infected 'Patient Zero' - now you must bring about the end of human history by evolving a deadly, global Plague whilst adapting against everything humanity can do to defend itself. Plague Inc: Evolved is a strategy, simulation and outbreak sim game developed and published by Ndemic Creations. Released on February 18th 2016 has received 55,664 reviews of which 52,571 were positive and 3,093 were negative resulting in an impressive rating of 9.3 out of 10. With 1,494 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Planets Under Attack.
9.3
52,571
3,093

1,494
players

5. Business Tour - Board Game with Online Multiplayer

Similarity 50% "Business Tour" is a free to play multiplayer tabletop game. Build your monopoly with friends. Complete daily tasks, compete against the other players and receive trade items rewards! Business Tour - Board Game with Online Multiplayer is a board game, free to play and multiplayer game developed by and published by 8floor. Released on July 27th 2017 has received 76,772 reviews of which 46,567 were positive and 30,205 were negative resulting in a rating of 6.0 out of 10. With 809 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Planets Under Attack.
6.0
46,567
30,205

809
players

6. Supreme Commander: Forged Alliance

Similarity 51% The last days of man are at hand.. Two years after the Infinite War the once great warring nations now lie in ruins, and humanity’s hope for a brighter future is nothing but a bitter memory. A new, seemingly unstoppable enemy, supported by the zealots of The Order, now seeks to eradicate mankind: UEF, Aeon Loyalist, and Cybran alike. Supreme Commander: Forged Alliance is a strategy, rts and sci-fi game developed by Gas Powered Games and published by Square Enix. Released on September 28th 2011 has received 13,468 reviews of which 13,042 were positive and 426 were negative resulting in an impressive rating of 9.4 out of 10. With 691 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Planets Under Attack.
9.4
13,042
426

691
players

7. Sins of a Solar Empire II

Similarity 61% Battle for galactic dominance in this real-time 4X strategy game with unrivaled scale! You’ll explore, expand, exploit, and exterminate through military force, diplomacy, trade, culture, influence, and other underhanded tactics. Sins of a Solar Empire II is a space, strategy and 4x game developed by Stardock Entertainment and Ironclad Games Corporation and published by Stardock Entertainment. Released on August 15th 2024 has received 6,946 reviews of which 5,949 were positive and 997 were negative resulting in a rating of 8.3 out of 10. With 544 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Planets Under Attack.
8.3
5,949
997

544
players

8. Cosmoteer: Starship Architect & Commander

Similarity 59% Design and simulate the starships of your dreams! Command your ship or fleet in epic battles and manage your crew while exploring a dangerous galaxy. Play alone or with friends, test your ships in online PvP, and let your imagination reach for the stars! Cosmoteer: Starship Architect & Commander is a sci-fi, singleplayer and 2d game developed and published by Walternate Realities. Released on October 24th 2022 has received 11,171 reviews of which 10,618 were positive and 553 were negative resulting in an impressive rating of 9.2 out of 10. With 482 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Planets Under Attack.
9.2
10,618
553

482
players

9. Terraforming Mars

Similarity 55% The taming of the Red Planet has begun! Corporations are competing to transform Mars into a habitable planet by spending vast resources and using innovative technology to raise temperature, create a breathable atmosphere, and make oceans of water. Terraforming Mars is a strategy, board game and space game developed by Artefacts Studio and published by Twin Sails Interactive. Released on October 17th 2018 has received 6,629 reviews of which 4,758 were positive and 1,871 were negative resulting in a rating of 7.0 out of 10. With 361 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Planets Under Attack.
7.0
4,758
1,871

361
players

10. ENDLESS™ Space 2

Similarity 59% ENDLESS™ Space 2 is a Strategic Space Opera, featuring the compelling “just one more turn” gameplay, set in the mysterious ENDLESS™ Universe. As the leader of your civilization, will you impose your vision and build the greatest stellar empire? ENDLESS™ Space 2 is a strategy, space and sci-fi game developed by AMPLITUDE Studios and published by SEGA. Released on May 18th 2017 has received 22,190 reviews of which 18,526 were positive and 3,664 were negative resulting in a rating of 8.2 out of 10. With 359 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Planets Under Attack.
8.2
18,526
3,664

359
players

Best deals on games like Planets Under Attack on Steam

Discover fantastic savings with the best discounts on a variety of games like Planets Under Attack available on Steam right now, updated on June 15th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Planets Under Attack.

1. EarthX

Similarity 63% EarthX is a rocket company management game. Go from launching small rockets on Earth to eventually building a colony on Mars. Create your own Internet constellation, develop new technologies, supply the International Space Station and terraform Mars! EarthX is a simulation, indie and strategy game developed by Denis and Ry and published by Mesote Games. Released on July 12th 2023 has received 875 reviews of which 769 were positive and 106 were negative resulting in a rating of 8.3 out of 10. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for games like Planets Under Attack.
8.3
769
106

-99% 19.99€ 0.29€

2. Battlestar Galactica Deadlock

Similarity 56% In Battlestar Galactica Deadlock™ you’ll take command of the Colonial Fleet in defense of the Twelve Colonies during the First Cylon War. Lead many different types of ships in this 3D tactical game. Every decision counts, your strategy will be vital – can you ensure mankind’s survival? Battlestar Galactica Deadlock is a strategy, space and sci-fi game developed by Black Lab Games and published by Slitherine Ltd.. Released on August 31st 2017 has received 3,460 reviews of which 2,906 were positive and 554 were negative resulting in a rating of 8.1 out of 10. Thanks to its incredible 99% discount, this game is now the #2 best deal in games like Planets Under Attack.
8.1
2,906
554

-99% 38.99€ 0.44€

3. Interstellar Space: Genesis

Similarity 64% Interstellar Space: Genesis is a turn-based space 4X strategy game in which you attempt to build a thriving galactic empire. Discover mysteries among the stars, colonize worlds, and engage enemies in tactical turn-based combat on your journey to becoming the ruler of the galaxy! Interstellar Space: Genesis is a strategy, indie and 4x game developed and published by Praxis Games. Released on July 25th 2019 has received 772 reviews of which 648 were positive and 124 were negative resulting in a rating of 7.9 out of 10. Thanks to its incredible 99% discount, this game is now the #3 best deal in games like Planets Under Attack.
7.9
648
124

-99% 27.99€ 0.45€

4. Homeworld: Deserts of Kharak

Similarity 60% A ground-based RTS prequel to the classic Homeworld games. Assemble your fleet and lead them to victory on the shifting sands of Kharak in this compelling strategy game for PC from Blackbird Interactive. Homeworld: Deserts of Kharak is a strategy, rts and sci-fi game developed by Blackbird Interactive and published by Gearbox Publishing. Released on January 20th 2016 has received 8,519 reviews of which 6,789 were positive and 1,730 were negative resulting in a rating of 7.8 out of 10. Currently offered at a significant 99% discount, this title has earned the #4 position in the best deals for games like Planets Under Attack.
7.8
6,789
1,730

-99% 45.99€ 0.88€

5. Aven Colony

Similarity 52% Build a new home for humanity in Aven Colony. Discover Aven Prime - an alien planet of deserts, tundras, and wetlands light years from earth. Build your colonies into massive, sprawling cities whilst dealing with the challenges faced when settling on a new world. Aven Colony is a colony sim, city builder and strategy game developed by Mothership Entertainment LLC and published by Team17 Digital Ltd. Released on July 25th 2017 has received 2,638 reviews of which 1,921 were positive and 717 were negative resulting in a rating of 7.1 out of 10. Currently offered at a significant 99% discount, this title has earned the #5 position in the best deals for games like Planets Under Attack.
7.1
1,921
717

-99% 29.99€ 0.47€

6. HERO DEFENSE

Similarity 59% CREEPS CRUMBLE. HEROES RISE. Command a team of renegade heroes and impale, slash, tear and burn through legions of undead hell-bent on world domination. Your mission: to defeat the world’s most powerful vampire, Count Necrosis. HERO DEFENSE is a tower defense, strategy and indie game developed by Happy Tuesday and published by Headup. Released on May 31st 2016 has received 747 reviews of which 471 were positive and 276 were negative resulting in a rating of 6.1 out of 10. Currently offered at a significant 99% discount, this title has earned the #6 position in the best deals for games like Planets Under Attack.
6.1
471
276

-99% 29.99€ 0.56€

7. ReignMaker

Similarity 50% ReignMaker: Saving the World One Tower at a Time. ReignMaker is a match-3 game with tower defense, city building, and political strategy elements. Your policy decisions determine the fate of your city and the direction of the story. Your match-3 and tower defense skills determine the fate of the world. ReignMaker is a casual, strategy and indie game developed and published by Frogdice. Released on April 16th 2014 has received 410 reviews of which 260 were positive and 150 were negative resulting in a rating of 6.1 out of 10. Currently offered at a significant 99% discount, this title has earned the #7 position in the best deals for games like Planets Under Attack.
6.1
260
150

-99% 14.99€ 0.20€

8. BattleGroupVR

Similarity 52% BattleGroupVR is a first person real-time space strategy where you lead a fleet of powerful warships into battle from the bridge of your own flagship. Assemble your fleet, upgrade your load-outs, train your captains, engage the enemy and secure the sector. Try not to go down with the ship. BattleGroupVR is a space sim, space and vr game developed and published by SpaceOwl Games. Released on July 31st 2023 has received 902 reviews of which 834 were positive and 68 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 98% discount, this title has earned the #8 position in the best deals for games like Planets Under Attack.
8.7
834
68

-98% 20.99€ 0.42€

9. Fibbage XL

Similarity 55% NOTE: This game first appeared in The Jackbox Party Pack. It’s Fibbage XL – The Hilarious Bluffing Party Game in standalone form! Fool your friends with your lies, avoid theirs, and find the (usually outrageous) truth. “The mayor of Rabbit Hash, Kentucky is a ____.” Baby? Rabbit? Ham sandwich? Go! Fibbage XL is a strategy, casual and indie game developed and published by Jackbox Games and Inc.. Released on March 24th 2016 has received 318 reviews of which 301 were positive and 17 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 98% discount, this title has earned the #9 position in the best deals for games like Planets Under Attack.
8.7
301
17

-98% 9.99€ 0.22€

10. DG2: Defense Grid 2

Similarity 77% Setting the bar as the definitive tower defense game, Defense Grid 2 introduces new worlds and threats to test your tower placement strategies. With a bold new look and the addition of new game modes, player-versus-player and multiplayer co-op, every play brings fun new opportunities and challenges. DG2: Defense Grid 2 is a strategy, tower defense and indie game developed by Hidden Path Entertainment and published by Hidden Path Entertainment and 505 Games. Released on September 23rd 2014 has received 3,163 reviews of which 2,723 were positive and 440 were negative resulting in a rating of 8.3 out of 10. Currently offered at a significant 98% discount, this title has earned the #10 position in the best deals for games like Planets Under Attack.
8.3
2,723
440

-98% 12.49€ 0.26€

Free games like Planets Under Attack on Steam

Check out this fantastic list of free-to-play games like Planets Under Attack you can enjoy on Steam right now, updated on June 15th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play games like Planets Under Attack.

1. Business Tour - Board Game with Online Multiplayer

Similarity 50% "Business Tour" is a free to play multiplayer tabletop game. Build your monopoly with friends. Complete daily tasks, compete against the other players and receive trade items rewards! Business Tour - Board Game with Online Multiplayer is a board game, free to play and multiplayer game developed by and published by 8floor. Released on July 27th 2017 has received 76,772 reviews of which 46,567 were positive and 30,205 were negative resulting in a rating of 6.0 out of 10. With 809 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Planets Under Attack.
6.0
46,567
30,205

809
players

2. Star Trek Timelines

Similarity 53% Explore the Final Frontier in the ultimate sci-fi strategy RPG, Star Trek Timelines! Join Starfleet and overcome challenges as you boldly go where no game has gone before – across the entire history of Star Trek. Star Trek Timelines is a free to play, strategy and space game developed and published by Tilting Point. Released on July 12th 2017 has received 1,430 reviews of which 938 were positive and 492 were negative resulting in a rating of 6.4 out of 10. Thanks to its free to play tag and a daily player base of 199, this game has secured the #2 spot in the ranking of free games like Planets Under Attack.
6.4
938
492

199
players

3. Pixel Starships

Similarity 53% Pixel Starships is an FTL-style online sci-fi strategy builder and management game with a competitive PVP tournament. Set in the retro galaxy, your role is to explore space, meet aliens, and develop your ship, crew and AI. The game contains deep strategic and 4x elements. PSS is community-driven. Pixel Starships is a sci-fi, space and strategy game developed and published by SavySoda. Released on May 23rd 2023 has received 2,732 reviews of which 2,008 were positive and 724 were negative resulting in a rating of 7.1 out of 10. Thanks to its free to play tag and a daily player base of 163, this game has secured the #3 spot in the ranking of free games like Planets Under Attack.
7.1
2,008
724

163
players

4. Hades' Star

Similarity 60% A unique space strategy game where thousands of players participate in one shared galaxy. Hades' Star is a free to play, space and strategy game developed and published by Parallel Space Inc. Released on February 27th 2019 has received 2,577 reviews of which 1,874 were positive and 703 were negative resulting in a rating of 7.1 out of 10. Attracting a solid base of 148 players due to its free access, this strategy game has achieved the #4 position in the best free games like Planets Under Attack.
7.1
1,874
703

148
players

5. Talisman: Digital Classic Edition

Similarity 53% The officially licensed multiplayer version of the classic fantasy adventure board game, Talisman, based on the 4th Edition of the game. On your travels, you will need strength, courage and some good dice rolls to survive the dangers you face and beat your opponents to the centre of the board! Talisman: Digital Classic Edition is a board game, tabletop and strategy game developed and published by Nomad Games. Released on February 25th 2014 has received 9,661 reviews of which 7,569 were positive and 2,092 were negative resulting in a rating of 7.7 out of 10. Attracting a solid base of 102 players due to its free access, this strategy game has achieved the #5 position in the best free games like Planets Under Attack.
7.7
7,569
2,092

102
players

6. Zero-K

Similarity 60% With 100+ truly unique units, Zero-K is an RTS of freedom and creativity, tempered by a decade of refinement. Sculpt land into a castle and throw invaders off it with a Jugglenaut. Explore a massive campaign, solo or co-op. Hop online for epic 32 player battles or fast paced 1v1, on 100s of maps. Zero-K is a strategy, free to play and rts game developed and published by Zero-K Team. Released on April 27th 2018 has received 3,922 reviews of which 3,678 were positive and 244 were negative resulting in an impressive rating of 9.0 out of 10. The game currently holds the #6 spot among the most played free games like Planets Under Attack.
9.0
3,678
244

96
players

7. My Lands: Black Gem Hunting

Similarity 56% My Lands is a free online RTS where dark and light forces fight for Black Gem and dominion in a vast fantasy world. Cooperation between players, joint economy development, creation of clans and alliances and elaboration of a team strategy serve as the very foundation of the game. My Lands: Black Gem Hunting is a strategy, free to play and rts game developed by Gravvit Ltd and Forbes Consult Ltd and published by ELYLAND INVESTMENT COMPANY Ltd. Released on September 16th 2014 has received 3,306 reviews of which 2,766 were positive and 540 were negative resulting in a rating of 8.1 out of 10. The game currently holds the #7 spot among the most played free games like Planets Under Attack.
8.1
2,766
540

65
players

8. Art of War: Red Tides

Similarity 54% Art of War: Red Tides is a fair multiplayer strategy game that allows different teams on the same platform (e.g. smartphones, PC, etc.) to battle against each other. You will encounter players around the world! Art of War: Red Tides is a free to play, strategy and multiplayer game developed and published by Game Science. Released on December 22nd 2016 has received 6,918 reviews of which 5,458 were positive and 1,460 were negative resulting in a rating of 7.7 out of 10. The game currently holds the #8 spot among the most played free games like Planets Under Attack.
7.7
5,458
1,460

44
players

9. Emporea: Realms of War and Magic

Similarity 50% Emporea is an oldschool fantasy strategy game, where cooperation with other players is necessary to achieve victory. Only the best alliance can win! Multiple realms available, with new ones starting every two weeks. Emporea: Realms of War and Magic is a free to play, strategy and massively multiplayer game developed and published by Pixel Federation. Released on June 08th 2016 has received 526 reviews of which 359 were positive and 167 were negative resulting in a rating of 6.6 out of 10. The game currently holds the #9 spot among the most played free games like Planets Under Attack.
6.6
359
167

37
players

10. AirMech

Similarity 53% AirMech® Strike is a fast paced Action-RTS game that can be played solo, coop, or competitively online. Earn Kudos and Experience in battle and unlock a wide collection of AirMechs and Units while you practice the perfect strategy to emerge victorious! AirMech is a free to play, strategy and multiplayer game developed and published by Carbon Games. Released on March 30th 2018 has received 10,679 reviews of which 8,984 were positive and 1,695 were negative resulting in a rating of 8.2 out of 10. The game currently holds the #10 spot among the most played free games like Planets Under Attack.
8.2
8,984
1,695

30
players