Games like Istrolid on Steam
For those who prefer not to search, lists of the most played, top deals and best free games like Istrolid are available at the bottom of the page.
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Zombie Defense
A modern hybrid of the classic RTS and modern Tower Defense. Recruit soldiers, place them on slots and let them shoot incoming waves of zombies by their own. Order supplies, throw grenades, order airstrikes and many more... Perfect mix of strategy, tactics and micromanagement.
Satisfactory
Satisfactory is a first-person open-world factory building game with a dash of exploration and combat. Play alone or with friends, explore an alien planet, create multi-story factories, and enter conveyor belt heaven!
Celestial Command
Mine asteroids, salvage space debris, design your own small or massive spacecraft using individual functional components, complete missions, and engage in battles against enemies in a vast galaxy with realistic physics based on orbital mechanics or in a classic physics mode.
They Can't Stop All Of Us
D.A.B. Your foes in co-op & PvP battles. (D)efend bases with weapons and skill. (A)ttack with clever AI armies. (B)uild amazingly creative defenses.
Cell to Singularity - Evolution Never Ends
The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.
Bio Inc. Redemption
Bio Inc.: Redemption is a realistic simulation and strategy game in which you make life or death decisions. Create a deadly illness to infect and torment your victim or play as the head of a medical team and hopefully find a cure to save your human patient. Will you be the plague or preserve humanity?
ASTRONEER
Interact with strange new worlds in a unique and tactile way, molding the environment itself as if it were clay in your hands. Build your base, master resource management, automate your production lines, and more as you unravel the mysteries of the universe, alone or with friends.
The Spatials
It's the year 5781 -- and you have been chosen to build and lead a space station in a wild corner of the galaxy! Attract visitors and explore hundreds of planets to fund your station.
Basement
Basement is a strategy game, where you start doing illegal business to fund the development of your dream video game. It won't be easy, so get ready to deal with other gangs, cops, crazy junkies, mysterious investor and even ghosts from the past.
Zero-K
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.
FortressCraft Evolved!
FortressCraft Evolved is a unique blend of Voxel Landscapes, Tower Defense, Crafting, Logistics, Exploration, Combat and Assembly lines. Players begin by crash-landing on a strange alien world, left with only a small handful of starting machines.
Axon TD: Uprising - Tower Defense
Axon TD lets you expand the map boundaries themselves. A huge arsenal of towers and a wide variety of enemies clash in a battlefield that grows to your whims. Engage in single, cooperative, and roguelite gameplay.
Sim Companies
Become a Business Tycoon. Build your own company from the ground up. Do business in a virtual economy with players all around the world! Gain valuable business skills for free. An advanced, proprietary, Economy simulation model is used to deliver the best gaming experience.
Dune: Spice Wars
A 4X real-time strategy game from the developers of the critically acclaimed Northgard. Set in Frank Herbert’s groundbreaking Dune universe, you must lead your faction and battle for control and dominance over the harsh desert planet of Arrakis.
Mr.Mine
Explore the depths of the earth and uncover hidden treasures in this addictive idle mining game. Unlock the power of your drill with hundreds of upgrades, discover mysterious relics, and unearth priceless gems. Can you master the mines and reveal their deepest secrets? Dive in and dig deep!
Reshaping Mars
「Reshaping Mars」is a colony simulation game on Mars, you will start by gathering resources, storing food, accepting immigrants, and building a better colony together. Develop powerful technologies for Mars Reshaping, make Mars great agai..sorry, just great. Don't forget to make the residents happy.
Space Simulation Toolkit
Physics sandbox game that uses a graphics card as a supercomputer. Change the laws of physics, design mechanisms, create A-Life worlds and inhabit them with living beings, experiment with evolution and AI.
Keplerth
Welcome to Keplerth! Try to survive on a hostile alien planet in this 2D sandbox RPG, where you can choose to live alone or fight side by side with your friends in the online multiplayer mode. Survive, build, farm, fight, and explore your way to victory in this open-world adventure!
MarZ: Tactical Base Defense
Build your defense base to fight back the undead hordes of Mars and secure the future of the red planet. MarZ is a game of strategy and tactical defense where you must carefully manage your crew and resources as you try to uncover the terrible secrets of the undead.
Gunscape
Gunscape provides easy-to-use tools based on a block-placement interface everybody's already familiar with to create all types of maps. Don't like building stuff? Then just blast your way through hordes of monsters or duel with other players!
My Lands: Black Gem Hunting
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.Most played games like Istrolid on Steam
Take a look at the top games like Istrolid that are currently attracting the largest player bases on the Steam platform, as of April 30th 2025.
1. RimWorld
Similarity 62% A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more. RimWorld is a colony sim, base-building and survival game developed and published by Ludeon Studios. Released on October 17th 2018 has received 208,163 reviews of which 203,940 were positive and 4,223 were negative resulting in an impressive rating of 9.7 out of 10. The game has hit the top spot as the #1 most played game like Istrolid, thanks to its 18,188 peak concurrent players over the last day.
9.7
203,940
4,223
18,188
players
2. Factorio
Similarity 62% Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and finally protect it from the creatures who don't really like you. Factorio is a automation, base-building and resource management game developed and published by Wube Software LTD.. Released on August 14th 2020 has received 213,390 reviews of which 206,974 were positive and 6,416 were negative resulting in an impressive rating of 9.6 out of 10. While seeing 13,456 players online at once in the last 24 hours, this game is currently ranked #2 among games like Istrolid based on player count.
9.6
206,974
6,416
13,456
players
3. Satisfactory
Similarity 60% Satisfactory is a first-person open-world factory building game with a dash of exploration and combat. Play alone or with friends, explore an alien planet, create multi-story factories, and enter conveyor belt heaven! Satisfactory is a base-building, automation and open world game developed by Coffee Stain Studios and published by Coffee Stain Publishing. Released on September 10th 2024 has received 229,040 reviews of which 222,475 were positive and 6,565 were negative resulting in an impressive rating of 9.6 out of 10. While seeing 12,693 players online at once in the last 24 hours, this game is currently ranked #3 among games like Istrolid based on player count.
9.6
222,475
6,565
12,693
players
4. Space Engineers
Similarity 72% Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses, pilot ships and travel through space to explore planets and gather resources to survive. Space Engineers is a space, sandbox and building game developed and published by Keen Software House. Released on February 28th 2019 has received 131,878 reviews of which 116,777 were positive and 15,101 were negative resulting in a rating of 8.7 out of 10. With 4,402 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Istrolid.
8.7
116,777
15,101
4,402
players
5. Oxygen Not Included
Similarity 72% Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive. Oxygen Not Included is a colony sim, base-building and survival game developed and published by Klei Entertainment. Released on July 30th 2019 has received 127,555 reviews of which 123,406 were positive and 4,149 were negative resulting in an impressive rating of 9.5 out of 10. With 4,349 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Istrolid.
9.5
123,406
4,149
4,349
players
6. Cell to Singularity - Evolution Never Ends
Similarity 59% The epic story of evolution, technology, humanity, and dinosaurs is yours to tap. Cell to Singularity - Evolution Never Ends is a clicker, free to play and simulation game developed and published by Computer Lunch. Released on November 03rd 2021 has received 23,393 reviews of which 21,027 were positive and 2,366 were negative resulting in a rating of 8.8 out of 10. With 2,520 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Istrolid.
8.8
21,027
2,366
2,520
players
7. Kerbal Space Program
Similarity 58% In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics. Kerbal Space Program is a space, simulation and sandbox game developed by Squad and published by Private Division. Released on April 27th 2015 has received 126,522 reviews of which 120,440 were positive and 6,082 were negative resulting in an impressive rating of 9.4 out of 10. With 1,958 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Istrolid.
9.4
120,440
6,082
1,958
players
8. Dyson Sphere Program
Similarity 65% Build the most efficient intergalactic factory in space simulation strategy game Dyson Sphere Program! Harness the power of stars, collect resources, plan and design production lines and develop your interstellar factory from a small space workshop to a galaxy-wide industrial empire. Dyson Sphere Program is a automation, space and base-building game developed by Youthcat Studio and published by Gamirror Games. Released on January 20th 2021 has received 84,667 reviews of which 82,683 were positive and 1,984 were negative resulting in an impressive rating of 9.6 out of 10. With 1,702 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Istrolid.
9.6
82,683
1,984
1,702
players
9. ASTRONEER
Similarity 59% Interact with strange new worlds in a unique and tactile way, molding the environment itself as if it were clay in your hands. Build your base, master resource management, automate your production lines, and more as you unravel the mysteries of the universe, alone or with friends. ASTRONEER is a multiplayer, open world and open world survival craft game developed and published by System Era Softworks. Released on February 05th 2019 has received 128,356 reviews of which 118,267 were positive and 10,089 were negative resulting in an impressive rating of 9.1 out of 10. With 1,230 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Istrolid.
9.1
118,267
10,089
1,230
players
10. Empyrion - Galactic Survival
Similarity 62% Build and explore in a true space sandbox survival adventure. Construct mighty capital vessels, sprawling planetary settlements, and vast space stations in your galactic journey to discover the mysteries of Empyrion! Empyrion - Galactic Survival is a simulation, co-op and open world survival craft game developed and published by Eleon Game Studios. Released on August 05th 2020 has received 33,145 reviews of which 26,115 were positive and 7,030 were negative resulting in a rating of 7.8 out of 10. With 1,095 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Istrolid.
7.8
26,115
7,030
1,095
players
Best deals on games like Istrolid on Steam
Discover fantastic savings with the best discounts on a variety of games like Istrolid available on Steam right now, updated on April 30th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Istrolid.
1. Distant Worlds: Universe
Similarity 58% Distant Worlds is a vast, pausable real-time 4X space strategy game. Experience the full depth and detail of turn-based strategy, but with the simplicity and ease of real-time, and on the scale of a massively-multiplayer online game. Distant Worlds: Universe is a strategy, 4x and space game developed by Code Force and published by Slitherine Ltd.. Released on May 23rd 2014 has received 1,816 reviews of which 1,376 were positive and 440 were negative resulting in a rating of 7.3 out of 10. Featuring a massive 92% discount, this game currently holds the #1 spot in the best deals for games like Istrolid.
7.3
1,376
440
-92%
28.00€
2.24€
2. Craft The World
Similarity 58% Craft The World is a unique sandbox strategy game, the mix of Dungeon Keeper, Terraria and Dwarf Fortress.Explore a random generated world populated by dangerous creatures, build a dwarf fortress, gather resources, and craft all the items, weapons, and armor you need. Craft The World is a dwarf, colony sim and crafting game developed by Dekovir Entertainment and published by Black Maple Games. Released on November 24th 2014 has received 15,885 reviews of which 14,060 were positive and 1,825 were negative resulting in a rating of 8.6 out of 10. Thanks to its incredible 80% discount, this game is now the #2 best deal in games like Istrolid.
8.6
14,060
1,825
-80%
18.65€
3.73€
3. Refactor
Similarity 59% Refactor is a hard-core tower defense game that combines modular building, route planning, and element composition. Refactor is a tower defense, rogue-lite and building game developed by GAGA and published by LightOn Game. Released on March 28th 2022 has received 449 reviews of which 385 were positive and 64 were negative resulting in a rating of 8.0 out of 10. Thanks to its incredible 80% discount, this game is now the #3 best deal in games like Istrolid.
8.0
385
64
-80%
4.99€
0.99€
4. ENDLESS™ Space 2
Similarity 65% 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 22,121 reviews of which 18,469 were positive and 3,652 were negative resulting in a rating of 8.2 out of 10. Currently offered at a significant 75% discount, this title has earned the #4 position in the best deals for games like Istrolid.
8.2
18,469
3,652
-75%
39.99€
9.99€
5. ASTRONEER
Similarity 59% Interact with strange new worlds in a unique and tactile way, molding the environment itself as if it were clay in your hands. Build your base, master resource management, automate your production lines, and more as you unravel the mysteries of the universe, alone or with friends. ASTRONEER is a multiplayer, open world and open world survival craft game developed and published by System Era Softworks. Released on February 05th 2019 has received 128,356 reviews of which 118,267 were positive and 10,089 were negative resulting in an impressive rating of 9.1 out of 10. Currently offered at a significant 72% discount, this title has earned the #5 position in the best deals for games like Istrolid.
9.1
118,267
10,089
-72%
29.64€
8.30€
6. One Lonely Outpost
Similarity 58% An alien world sometimes needs a farmer’s touch to bring it to life. In this sci-fi, colonization-life sim, terraform a barren world: turn wastelands into verdant landscapes while exploring, farming, building, and unlocking all the mysteries of this strange new planet. One Lonely Outpost is a farming sim, colony sim and indie game developed and published by indie.io. Released on March 06th 2025 has received 565 reviews of which 364 were positive and 201 were negative resulting in a rating of 6.2 out of 10. Currently offered at a significant 72% discount, this title has earned the #6 position in the best deals for games like Istrolid.
6.2
364
201
-72%
18.54€
5.19€
7. Planetary Annihilation: TITANS
Similarity 68% Wage war across entire solar systems with massive armies at your command. Annihilate enemy forces with world-shattering TITAN-class units, and demolish planets with massive super weapons! Planetary Annihilation: TITANS is a rts, strategy and real time tactics game developed and published by Planetary Annihilation Inc. Released on August 18th 2015 has received 14,087 reviews of which 11,945 were positive and 2,142 were negative resulting in a rating of 8.3 out of 10. Currently offered at a significant 70% discount, this title has earned the #7 position in the best deals for games like Istrolid.
8.3
11,945
2,142
-70%
25.40€
7.62€
8. 8-Bit Hordes
Similarity 58% 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! 8-Bit Hordes is a strategy, indie and rts game developed and published by Petroglyph. Released on August 12th 2016 has received 525 reviews of which 429 were positive and 96 were negative resulting in a rating of 7.7 out of 10. Currently offered at a significant 70% discount, this title has earned the #8 position in the best deals for games like Istrolid.
7.7
429
96
-70%
14.57€
4.37€
9. Keplerth
Similarity 58% Welcome to Keplerth! Try to survive on a hostile alien planet in this 2D sandbox RPG, where you can choose to live alone or fight side by side with your friends in the online multiplayer mode. Survive, build, farm, fight, and explore your way to victory in this open-world adventure! Keplerth is a adventure, exploration and sandbox game developed by taro and published by Gamirror Games. Released on May 23rd 2022 has received 4,008 reviews of which 3,406 were positive and 602 were negative resulting in a rating of 8.2 out of 10. Currently offered at a significant 68% discount, this title has earned the #9 position in the best deals for games like Istrolid.
8.2
3,406
602
-68%
12.50€
4.00€
10. Mindustry
Similarity 69% An open-ended factory management game with RTS and tower defense elements. Mindustry is a base-building, resource management and tower defense game developed and published by AnukenDev. Released on September 26th 2019 has received 21,635 reviews of which 20,742 were positive and 893 were negative resulting in an impressive rating of 9.4 out of 10. Currently offered at a significant 60% discount, this title has earned the #10 position in the best deals for games like Istrolid.
9.4
20,742
893
-60%
9.99€
3.99€
Free games like Istrolid on Steam
Check out this fantastic list of free-to-play games like Istrolid you can enjoy on Steam right now, updated on April 30th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play games like Istrolid.
1. Cell to Singularity - Evolution Never Ends
Similarity 59% The epic story of evolution, technology, humanity, and dinosaurs is yours to tap. Cell to Singularity - Evolution Never Ends is a clicker, free to play and simulation game developed and published by Computer Lunch. Released on November 03rd 2021 has received 23,393 reviews of which 21,027 were positive and 2,366 were negative resulting in a rating of 8.8 out of 10. With 2,520 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Istrolid.
8.8
21,027
2,366
2,520
players
2. Fallout Shelter
Similarity 64% Fallout Shelter puts you in control of a state-of-the-art underground Vault from Vault-Tec. Build the perfect Vault, keep your Dwellers happy, and protect them from the dangers of the Wasteland. Fallout Shelter is a free to play, base-building and survival game developed by Bethesda Game Studios and published by Bethesda Softworks. Released on March 29th 2017 has received 73,924 reviews of which 65,394 were positive and 8,530 were negative resulting in a rating of 8.7 out of 10. Thanks to its free to play tag and a daily player base of 949, this game has secured the #2 spot in the ranking of free games like Istrolid.
8.7
65,394
8,530
949
players
3. Mr.Mine
Similarity 58% Explore the depths of the earth and uncover hidden treasures in this addictive idle mining game. Unlock the power of your drill with hundreds of upgrades, discover mysterious relics, and unearth priceless gems. Can you master the mines and reveal their deepest secrets? Dive in and dig deep! Mr.Mine is a idler, clicker and simulation game developed and published by Playsaurus. Released on September 30th 2020 has received 16,977 reviews of which 15,607 were positive and 1,370 were negative resulting in a rating of 9.0 out of 10. Thanks to its free to play tag and a daily player base of 872, this game has secured the #3 spot in the ranking of free games like Istrolid.
9.0
15,607
1,370
872
players
4. Realm Grinder
Similarity 65% Grow your realm, build alliances, and explore one of the deepest idle RPGs ever! Realm Grinder is a free to play, clicker and pixel graphics game developed by Divine Games and published by Kongregate. Released on June 15th 2017 has received 7,059 reviews of which 6,148 were positive and 911 were negative resulting in a rating of 8.5 out of 10. Attracting a solid base of 761 players due to its free access, this strategy game has achieved the #4 position in the best free games like Istrolid.
8.5
6,148
911
761
players
5. OpenTTD
Similarity 69% OpenTTD is a business simulation game in which players earn money by transporting passengers and cargo via road, rail, water, and air. It is an open-source remake and expansion of the 1995 Chris Sawyer video game Transport Tycoon Deluxe. OpenTTD is a simulation, building and free to play game developed and published by OpenTTD. Released on April 01st 2021 has received 14,214 reviews of which 13,670 were positive and 544 were negative resulting in an impressive rating of 9.4 out of 10. Attracting a solid base of 377 players due to its free access, this strategy game has achieved the #5 position in the best free games like Istrolid.
9.4
13,670
544
377
players
6. Stronghold Kingdoms
Similarity 58% A massively multiplayer grand strategy game, Stronghold Kingdoms is about forging alliances, political mind games, city-building and castle sieges with thousands of other players! Stronghold Kingdoms is a strategy, free to play and medieval game developed and published by FireFly Studios. Released on February 27th 2012 has received 9,313 reviews of which 5,957 were positive and 3,356 were negative resulting in a rating of 6.3 out of 10. Attracting a solid base of 296 players due to its free access, this strategy game has achieved the #6 position in the best free games like Istrolid.
6.3
5,957
3,356
296
players
7. Idle Spiral
Similarity 58% This is a beautiful "Idle", "Incremental" game based on spirals and mathematics. Your goal is to make the spiral grow farther and farther from the origin. The game is very simple, but it is very deep and can be enjoyed for a long time! Idle Spiral is a idler, simulation and clicker game developed by Idle System, Inc. and Yayu and published by Idle System and Inc.. Released on April 30th 2022 has received 1,744 reviews of which 1,416 were positive and 328 were negative resulting in a rating of 7.8 out of 10. Attracting a solid base of 233 players due to its free access, this strategy game has achieved the #7 position in the best free games like Istrolid.
7.8
1,416
328
233
players
8. Bloons TD Battles
Similarity 71% Go head to head with other players in a Bloon-popping battle for victory. From the creators of best-selling Bloons TD 5, this all new Battles game is specially designed for multiplayer combat, featuring the ability to control bloons directly and send them charging past your opponent's defenses. Bloons TD Battles is a free to play, tower defense and multiplayer game developed and published by Ninja Kiwi. Released on April 20th 2016 has received 29,071 reviews of which 26,380 were positive and 2,691 were negative resulting in a rating of 8.9 out of 10. Attracting a solid base of 196 players due to its free access, this strategy game has achieved the #8 position in the best free games like Istrolid.
8.9
26,380
2,691
196
players
9. Sim Companies
Similarity 58% Become a Business Tycoon. Build your own company from the ground up. Do business in a virtual economy with players all around the world! Gain valuable business skills for free. An advanced, proprietary, Economy simulation model is used to deliver the best gaming experience. Sim Companies is a economy, capitalism and simulation game developed and published by Sim Companies s.r.o.. Released on August 31st 2023 has received 837 reviews of which 668 were positive and 169 were negative resulting in a rating of 7.6 out of 10. Attracting a solid base of 142 players due to its free access, this strategy game has achieved the #9 position in the best free games like Istrolid.
7.6
668
169
142
players
10. Pixel Starships
Similarity 75% 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 2,699 reviews of which 1,985 were positive and 714 were negative resulting in a rating of 7.1 out of 10. Attracting a solid base of 138 players due to its free access, this strategy game has achieved the #10 position in the best free games like Istrolid.
7.1
1,985
714
138
players