Games like Grey Goo on Steam

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

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Becastled Becastled is about building and defending your castle from sieges in a fantasy world!

Similarity 41%
Price 14.99€
Rating 8.0
Release 08 Feb 2021
Codename: Panzers, Phase One Codename: Panzers is an incredible real-time strategy thrill ride. Nerves of steel are required when you're a tank driver. One direct hit and you're done for, but you must throw yourself into the battle, because without your support, many will die. You are the tank commander - make the hard decisions that win wars!

Similarity 41%
Price -88% 1.92€
Rating 8.5
Release 18 Feb 2016
Men of War: Assault Squad 2 Men of War: Assault Squad 2 features new single player style skirmish modes that take players from extreme tank combat to deadly sniper stealth missions. Commanders can now faceoff against opponents on various new multiplayer 1v1 – 8v8 maps.

Similarity 41%
Price -97% 1.17€
Rating 9.0
Release 15 May 2014
Wargame: Airland Battle 2 SIDES, 12 NATIONS, 750 UNITS: THE STRATEGY GAME REFERENCE IS BACK! Richer, more beautiful and more accessible, Wargame AirLand Battle is the sequel to the explosive real-time strategy game Wargame European Escalation! 1985.

Similarity 41%
Price -77% 4.61€
Rating 8.4
Release 29 May 2013
GLADIABOTS - AI Combat Arena Assemble your robot squad, construct their AI and send them in the battle arena to see your strategy play out. Iterate, improve and repeat until you outsmart all your opponents and friends online.

Similarity 41%
Price 14.79€
Rating 8.4
Release 22 May 2019
Dungeons 4 The Absolute Evil and its trusted *cough* servant, the Dark Elf Thalya, return in Dungeons 4 after the events of its fabulous predecessor to bring about their triumph over the forces of good once more.

Similarity 41%
Price -55% 22.70€
Rating 8.6
Release 09 Nov 2023
S.W.I.N.E. HD Remaster S.W.I.N.E. HD Remaster is the new edition of the challenging classic strategy game S.W.I.N.E! The filthiest of all wars between the Rabbit and the Pig armies is a sophisticated real-time strategy with completely revised textures, detailed unit models, a 16:9 adapted interface.

Similarity 41%
Price -95% 0.52€
Rating 8.6
Release 23 May 2019
Anomaly Korea Exclusively brought to Steam for PC, Mac and Linux in Anomaly Bundle, Anomaly Korea is an expansion campaign to Anomaly Warzone Earth. The alien robots are back and this time they’ve got Korea in their sights. It’s your job to lead a squad into fierce fire-fights and fend off the alien invasion.

Similarity 41%
Price -86% 0.69€
Rating 7.5
Release 06 Nov 2013
Star Trek Timelines 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.

Similarity 41%
Price Free to play
Rating 6.4
Release 12 Jul 2017
The Settlers® : Rise of an Empire - History Edition Build vibrant cities in a medieval world with this modernized version of The Settlers – Rise of an Empire. Each character leads their individual lives and can be observed by you at any time. Will you go down in history as a legendary king?

Similarity 41%
Price 11.99€
Rating 7.2
Release 22 Jan 2019
Interstellar Space: Genesis 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!

Similarity 41%
Price -99% 0.46€
Rating 7.9
Release 25 Jul 2019
Guardians Frontline Guardians Frontline is a sci-fi VR shooter that makes you a soldier and a commander. Fight off enemies and build bases in a single-player and co-op campaign, plus PvP game modes with full cross-play support.

Similarity 41%
Price -92% 2.01€
Rating 7.7
Release 09 Mar 2023
Sacrifice Sacrifice is the acclaimed real-time strategy game that focuses on combat instead of resource gathering. The only two resources you'll need to worry about are mana and souls. Need more units? Capture the souls of your enemy. Cast spells of awesome power.

Similarity 41%
Price 9.99€
Rating 8.7
Release 19 Aug 2009
Kingdom Wars Kingdom Wars is a free to play 3D MMORTS with real-time siege combat, without the pay to win element so common in the genre. Kingdom Wars offers beautiful 3D online world, where players construct strongholds, direct citizens, complete quests and eventually manage a global empire.

Similarity 41%
Price Free to play
Rating 6.6
Release 01 Apr 2013
Alien Hallway Players measure stamina with a never-ending stream of green creatures within the borders of a special military mission.

Similarity 41%
Price 4.99€
Rating 6.2
Release 19 Aug 2011
Cultures - 8th Wonder of the World Solve the mystery surrounding the 8th Wonder of the World with your heroes and banish evil from the Earth! Play this RTS-Classic.

Similarity 40%
Price 4.99€
Rating 7.8
Release 26 Mar 2015
Don't Bite Me Bro! + Don't Bite Me Bro! is a 1-4 Player Couch Co-op open-world zombie apocalypse game. Explore the world for resources, find and save survivors throughout the world, each which become playable characters with unique traits and abilities.

Similarity 40%
Price 0.99€
Rating 7.5
Release 16 Jul 2018
Crysis Warhead® Pulse-racing new installment from 2007's PC Game of the Year*: Play as Sergeant Sykes and experience a whole new side of the battle. A standard combat mission behind enemy lines becomes critical when you discover your enemies have captured something of vital importance to the ensuing war.

Similarity 40%
Price 19.99€
Rating 8.3
Release 17 Sep 2008
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 40%
Price -91% 0.46€
Rating 8.2
Release 13 Jun 2014
Kingdom Wars 2: Definitive Edition An intense real-time strategy game set in a dark fantasy world of Orcs, Elves and Dragons. Kingdom Wars 2 combines the best of Zombie survival and crafting with complex fast-paced city building. Fight massive siege battles that turn beautiful landscapes into gory blood-soaked battlefields.

Similarity 40%
Price 9.49€
Rating 6.4
Release 09 Jul 2019
LOST PLANET® 3 The extreme and unpredictable conditions that characterized the Lost Planet series return, harsher than ever before. Lost Planet 3 reveals new truths about the foreboding planet and the colonial history of E.D.N. III.

Similarity 40%
Price -80% 4.99€
Rating 6.2
Release 26 Aug 2013
Heroes of Might & Magic V: Tribes of the East For the first time, play as the Orc faction and recruit heroes, build armies and manage cities as you explore and conquer legendary lands. Use tactics, skills and magic to outsmart fantasy armies while developing your heroes and unveiling the dark plot that threatens to tear the world of Ashan apart.

Similarity 40%
Price 9.99€
Rating 8.9
Release 10 Oct 2008
X3: Reunion X3: Reunion continues the epic space saga, blending deep space trading and intense real-time combat. Explore a vast universe, establish your empire, and shape the new frontier. With enhanced graphics and intricate economies, it's a journey of strategy, simulation, and interstellar intrigue.

Similarity 40%
Price -86% 1.46€
Rating 6.9
Release 21 Jul 2006
The Great War: Western Front™ The Great War: Western Front is the definitive WW1 strategy game. Play a deciding role in history with this real-time tactical experience as you take charge in the iconic Western Front from 1914 to 1919. Pick your faction and lead your forces to victory.

Similarity 40%
Price 34.99€
Rating 6.6
Release 30 Mar 2023

Most played games like Grey Goo on Steam

Take a look at the top games like Grey Goo that are currently attracting the largest player bases on the Steam platform, as of June 16th 2025.

1. Age of Empires II: Definitive Edition

Similarity 62% 42 Civilizations, 229 Campaign Missions, Singleplayer, Co-Op, Multiplayer, In-Game Editor, Mods, Cross-play...It is good to be the king. Age of Empires II: Definitive Edition is a strategy, rts and city builder game developed by Forgotten Empires, Tantalus Media, Wicked Witch, World's Edge and CaptureAge and published by Xbox Game Studios. Released on November 14th 2019 has received 162,462 reviews of which 154,061 were positive and 8,401 were negative resulting in an impressive rating of 9.4 out of 10. The game has hit the top spot as the #1 most played game like Grey Goo, thanks to its 15,584 peak concurrent players over the last day.
9.4
154,061
8,401

15,584
players

2. Stellaris

Similarity 49% 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. While seeing 13,555 players online at once in the last 24 hours, this game is currently ranked #2 among games like Grey Goo based on player count.
8.5
159,527
25,906

13,555
players

3. Bloons TD 6

Similarity 41% The Bloons are back and better than ever! Get ready for a massive 3D tower defense game designed to give you hours and hours of the best strategy gaming available. Bloons TD 6 is a tower defense, strategy and multiplayer game developed and published by Ninja Kiwi. Released on December 17th 2018 has received 353,960 reviews of which 344,269 were positive and 9,691 were negative resulting in an impressive rating of 9.6 out of 10. While seeing 9,200 players online at once in the last 24 hours, this game is currently ranked #3 among games like Grey Goo based on player count.
9.6
344,269
9,691

9,200
players

4. Age of Empires IV: Anniversary Edition

Similarity 65% Celebrating its first year of delighting millions of global players, the award-winning and best-selling strategy franchise continues with Age of Empires IV: Anniversary Edition, putting you at the center of even more epic historical battles that shaped the world. Age of Empires IV: Anniversary Edition is a strategy, rts and base-building game developed by Relic Entertainment, Forgotten Empires, Climax Studios and World's Edge and published by Xbox Game Studios. Released on October 28th 2021 has received 80,870 reviews of which 69,559 were positive and 11,311 were negative resulting in a rating of 8.5 out of 10. With 6,242 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Grey Goo.
8.5
69,559
11,311

6,242
players

5. Age of Empires III: Definitive Edition

Similarity 64% Age of Empires III: Definitive Edition offers players a trial of this historical single & multiplayer RTS experience. *Note: To unlock all features of the game please see the “Base Game” product. Age of Empires III: Definitive Edition is a strategy, base-building and rts game developed by World's Edge, Tantalus Media and Forgotten Empires and published by Xbox Game Studios. Released on October 15th 2020 has received 48,342 reviews of which 40,941 were positive and 7,401 were negative resulting in a rating of 8.3 out of 10. With 3,597 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Grey Goo.
8.3
40,941
7,401

3,597
players

6. Anno 1800

Similarity 40% Anno 1800™ – Lead the Industrial Revolution! Welcome to the dawn of the Industrial Age. The path you choose will define your world. Are you an innovator or an exploiter? A conqueror or a liberator? How the world remembers your name is up to you. Anno 1800 is a city builder, strategy and simulation game developed by Ubisoft Mainz and published by Ubisoft. Released on April 16th 2019 has received 25,091 reviews of which 20,368 were positive and 4,723 were negative resulting in a rating of 8.0 out of 10. With 3,157 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Grey Goo.
8.0
20,368
4,723

3,157
players

7. STAR WARS™ Empire at War - Gold Pack

Similarity 72% 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. With 2,985 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Grey Goo.
9.6
38,503
932

2,985
players

8. Age of Empires II (Retired)

Similarity 59% Age of Empires II has been re-imagined in high definition. With the release of Age of Empires II: Definitive Edition, this product will not be updated further. Age of Empires II (Retired) is a strategy, rts and medieval game developed by SkyBox Labs, Hidden Path Entertainment, Ensemble Studios and Forgotten Empires and published by Xbox Game Studios. Released on April 09th 2013 has received 101,351 reviews of which 97,083 were positive and 4,268 were negative resulting in an impressive rating of 9.4 out of 10. With 2,630 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Grey Goo.
9.4
97,083
4,268

2,630
players

9. Age of Mythology: Retold

Similarity 44% From the creators of the award-winning Age of Empires franchise, Age of Mythology: Retold goes beyond history to a mythical age where gods, monsters, and humans collide. Age of Mythology: Retold is a strategy, 3d and rts game developed by World's Edge, Forgotten Empires, Tantalus Media, CaptureAge and Virtuos Games and published by Xbox Game Studios. Released on September 04th 2024 has received 16,708 reviews of which 15,043 were positive and 1,665 were negative resulting in a rating of 8.8 out of 10. With 2,425 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Grey Goo.
8.8
15,043
1,665

2,425
players

10. Total War: SHOGUN 2

Similarity 46% Total War: SHOGUN 2 is the perfect mix of real-time and turn-based strategy gaming for newcomers and veterans alike. Total War: SHOGUN 2 is a strategy, historical and turn-based strategy game developed by Creative Assembly and Feral Interactive (Linux) and published by Feral interactive (Mac), Feral Interactive (Linux) and SEGA. Released on March 14th 2011 has received 24,952 reviews of which 22,620 were positive and 2,332 were negative resulting in a rating of 8.9 out of 10. With 2,117 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Grey Goo.
8.9
22,620
2,332

2,117
players

Best deals on games like Grey Goo on Steam

Discover fantastic savings with the best discounts on a variety of games like Grey Goo available on Steam right now, updated on June 16th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Grey Goo.

1. Starship Troopers: Terran Command

Similarity 56% Lead the Mobile Infantry in this RTS game set in the Starship Troopers film universe. Balance your army composition with a diverse set of unit types, overcome line-of-sight and line-of-fire challenges through tactical positioning, and use special abilities to smash the Arachnid hordes! Starship Troopers: Terran Command is a strategy, rts and singleplayer game developed by The Artistocrats and published by Slitherine Ltd.. Released on June 16th 2022 has received 10,784 reviews of which 9,461 were positive and 1,323 were negative resulting in a rating of 8.5 out of 10. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for games like Grey Goo.
8.5
9,461
1,323

-99% 28.99€ 0.46€

2. Interstellar Space: Genesis

Similarity 41% 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 #2 best deal in games like Grey Goo.
7.9
648
124

-99% 27.99€ 0.46€

3. Homeworld: Deserts of Kharak

Similarity 82% 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. Thanks to its incredible 99% discount, this game is now the #3 best deal in games like Grey Goo.
7.8
6,789
1,730

-99% 45.99€ 0.88€

4. Ashes of the Singularity: Escalation

Similarity 45% A massive-scale real-time strategy game where you command entire armies on a dynamic battlefield. Conquer multiple worlds across several single-player campaigns; or play with your friends in multiplayer combat. Ashes of the Singularity: Escalation is a rts, base-building and pvp game developed by Stardock Entertainment and Oxide Games and published by Stardock Entertainment. Released on November 10th 2016 has received 4,772 reviews of which 3,548 were positive and 1,224 were negative resulting in a rating of 7.2 out of 10. Currently offered at a significant 99% discount, this title has earned the #4 position in the best deals for games like Grey Goo.
7.2
3,548
1,224

-99% 28.99€ 0.56€

5. Aven Colony

Similarity 43% 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 Grey Goo.
7.1
1,921
717

-99% 29.99€ 0.47€

6. XCOM: Enemy Unknown

Similarity 49% The XCOM: Enemy Unknown - Slingshot Pack is Now Available! XCOM: Enemy Unknown is a turn-based strategy, tactical and strategy game developed by Firaxis Games and Feral Interactive (Linux) and published by Feral Interactive (Linux) and 2K. Released on October 11th 2012 has received 56,414 reviews of which 52,717 were positive and 3,697 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 98% discount, this title has earned the #6 position in the best deals for games like Grey Goo.
9.2
52,717
3,697

-98% 19.99€ 0.47€

7. BattleGroupVR

Similarity 50% 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 #7 position in the best deals for games like Grey Goo.
8.7
834
68

-98% 20.99€ 0.42€

8. DG2: Defense Grid 2

Similarity 51% 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 #8 position in the best deals for games like Grey Goo.
8.3
2,723
440

-98% 12.49€ 0.26€

9. Battlestar Galactica Deadlock

Similarity 50% 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. Currently offered at a significant 98% discount, this title has earned the #9 position in the best deals for games like Grey Goo.
8.1
2,906
554

-98% 38.99€ 1.00€

10. Tooth and Tail

Similarity 58% Lead the revolution with an army of flamethrowing Boars, mustard gas-lobbing Skunks, and paratrooper-puking Owls. Tooth and Tail is a Real-Time-Strategy game featuring Single Player, Online Competitive Play, Split Screen, Replays, and more. Build a base, lead your army, eat your enemies! Tooth and Tail is a strategy, rts and pixel graphics game developed and published by Pocketwatch Games. Released on September 12th 2017 has received 4,057 reviews of which 3,242 were positive and 815 were negative resulting in a rating of 7.8 out of 10. Currently offered at a significant 98% discount, this title has earned the #10 position in the best deals for games like Grey Goo.
7.8
3,242
815

-98% 19.99€ 0.56€

Free games like Grey Goo on Steam

Check out this fantastic list of free-to-play games like Grey Goo you can enjoy on Steam right now, updated on June 16th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play games like Grey Goo.

1. Age of Empires III: Definitive Edition

Similarity 64% Age of Empires III: Definitive Edition offers players a trial of this historical single & multiplayer RTS experience. *Note: To unlock all features of the game please see the “Base Game” product. Age of Empires III: Definitive Edition is a strategy, base-building and rts game developed by World's Edge, Tantalus Media and Forgotten Empires and published by Xbox Game Studios. Released on October 15th 2020 has received 48,342 reviews of which 40,941 were positive and 7,401 were negative resulting in a rating of 8.3 out of 10. With 3,597 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Grey Goo.
8.3
40,941
7,401

3,597
players

2. War Selection

Similarity 58% War Selection is a compelling RTS game featuring base building, resource extraction and warfare. Evolve from a stone age tribe to a distinct industrial nation with unique game mechanics and battle for supremacy with dozens of players on a unique procedurally generated map. War Selection is a strategy, base-building and free to play game developed and published by Glyph Worlds. Released on October 08th 2019 has received 21,854 reviews of which 18,745 were positive and 3,109 were negative resulting in a rating of 8.4 out of 10. Thanks to its free to play tag and a daily player base of 486, this game has secured the #2 spot in the ranking of free games like Grey Goo.
8.4
18,745
3,109

486
players

3. MechWarrior Online™ Legends

Similarity 42% MechWarrior Online™ Legends is a tactical, 'Mech-based online shooter set in the vast BattleTech Universe. Assume the role of an elite MechWarrior, piloting powerful BattleMechs, fighting for supremacy over the Inner Sphere. MechWarrior Online™ Legends is a free to play, mechs and multiplayer game developed and published by Piranha Games Inc.. Released on December 10th 2015 has received 12,220 reviews of which 9,790 were positive and 2,430 were negative resulting in a rating of 7.8 out of 10. Thanks to its free to play tag and a daily player base of 450, this game has secured the #3 spot in the ranking of free games like Grey Goo.
7.8
9,790
2,430

450
players

4. Battle Nations

Similarity 45% Battle Nations is back! Build your empire and lead your armies to victory! Choose from traditional troops and vehicles or unleash exotic forces like mammoths, velociraptors, sandworms, and futuristic plasma units! Battle Nations is a free to play, strategy and turn-based strategy game developed and published by Madrona Games Inc. Released on September 18th 2014 has received 1,407 reviews of which 963 were positive and 444 were negative resulting in a rating of 6.6 out of 10. Attracting a solid base of 248 players due to its free access, this strategy game has achieved the #4 position in the best free games like Grey Goo.
6.6
963
444

248
players

5. EMERGENCY

Similarity 53% Save lives – be a hero! Join forces against the chaos in the newest title of the award-winning EMERGENCY series. Take up your shift as incident commander and coordinate with other players to fight fires, arrest gangsters and rescue injured civilians. Your city needs you! EMERGENCY is a free to play, multiplayer and strategy game developed and published by Sixteen Tons Entertainment. Released on August 15th 2023 has received 5,564 reviews of which 3,797 were positive and 1,767 were negative resulting in a rating of 6.7 out of 10. Attracting a solid base of 197 players due to its free access, this strategy game has achieved the #5 position in the best free games like Grey Goo.
6.7
3,797
1,767

197
players

6. Star Trek Timelines

Similarity 41% 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. Attracting a solid base of 148 players due to its free access, this strategy game has achieved the #6 position in the best free games like Grey Goo.
6.4
938
492

148
players

7. Pixel Starships

Similarity 51% 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. Attracting a solid base of 117 players due to its free access, this strategy game has achieved the #7 position in the best free games like Grey Goo.
7.1
2,008
724

117
players

8. Hades' Star

Similarity 56% 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 104 players due to its free access, this strategy game has achieved the #8 position in the best free games like Grey Goo.
7.1
1,874
703

104
players

9. Zero-K

Similarity 53% 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 #9 spot among the most played free games like Grey Goo.
9.0
3,678
244

93
players

10. My Lands: Black Gem Hunting

Similarity 50% 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 #10 spot among the most played free games like Grey Goo.
8.1
2,766
540

51
players