Games like Outpost: Infinity Siege on Steam
For those who prefer not to search, lists of the most played, top deals and best free games like Outpost: Infinity Siege are available at the bottom of the page.
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Taur
Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?
Sanctum 2
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence.
The Riftbreaker
The Riftbreaker™ is a base-building, survival game with Action-RPG elements. You are an elite scientist/commando inside an advanced Mecha-Suit capable of dimensional rift travel. Hack & slash countless enemies. Build up your base, collect samples and research new inventions to survive.
Exogate Initiative
Build and manage mankind’s first mission across the universe! Create a sprawling facility underground, recruit a diverse group of specialists from around the globe and explore mysterious new worlds through the Exogate.
Sanctum
You think Tower Defense games are all about building? You thought wrong. Sanctum is not your average Tower Defense title. When the havoc starts, you get to join the fray! As one of the world’s first First Person Shooter - Tower Defense games, Sanctum has taken the best of both worlds to deliver an epic, one-of-a-kind experience.
Oddsparks: An Automation Adventure
Oddsparks is a blend of automation and real-time strategy for both the die-hard fans of the automation genre and the automation-curious. Explore a strange fantasy world, uncover the mysteries of the past, automate your workshops, and go on adventures with your odd & adorable Sparks!
Supreme Commander 2
Includes 47 Steam achievements, leaderboards, and stats!
Tower Dominion
Build and design the terrain while defending your stronghold against alien invasion in this unique Roguelike tower defense. Choose from 30 heroes, survive enemy waves, and upgrade a variety of destructive towers to hold the line!
Main Assembly
You’re the designer, engineer and architect if you can imagine it you can create it! Construct robots of any shape or size from eight-legged spider bots to eerie UFO contraptions.
Age of Mythology: Retold
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.
shapez
shapez is an easy-going, minimalistic factory building game about the automation of shapes through extraction and satisfying production lines. Adapt to increasingly complex shapes and grow your factory across an infinitely expanding map. Your only limitation is your creativity!
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.
Eximius: Seize the Frontline
EXIMIUS is a FPS/RTS hybrid that focuses on squad-based combat. The game features an intense 5v5 multiplayer experience with each team comprising of 4 Squad Officers and one Commander.
Meet Your Maker
Meet Your Maker is a building game of brutal expression and conquest. Unleash your inner evil genius in co-op or single-player to build the ultimate fortress of devious deathtraps, or take on those built by others in a high-stakes heist to steal resources essential for your survival.
Most played games like Outpost: Infinity Siege on Steam
Take a look at the top games like Outpost: Infinity Siege that are currently attracting the largest player bases on the Steam platform, as of June 15th 2025.
1. Bloons TD 6
Similarity 43% 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. The game has hit the top spot as the #1 most played game like Outpost: Infinity Siege, thanks to its 9,320 peak concurrent players over the last day.
9.6
344,269
9,691
9,320
players
2. Age of Mythology: Retold
Similarity 41% 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. While seeing 2,556 players online at once in the last 24 hours, this game is currently ranked #2 among games like Outpost: Infinity Siege based on player count.
8.8
15,043
1,665
2,556
players
3. FOUNDRY
Similarity 40% Build a sophisticated robot factory optimized to perfection in an infinite voxel world. Mine and harvest resources, automate your production lines and manage complex systems while researching your way to become the galaxy’s leading robotics megacorp. FOUNDRY is a early access, automation and base-building game developed by Channel 3 Entertainment and published by Paradox Interactive. Released on May 02nd 2024 has received 2,783 reviews of which 2,197 were positive and 586 were negative resulting in a rating of 7.6 out of 10. While seeing 1,149 players online at once in the last 24 hours, this game is currently ranked #3 among games like Outpost: Infinity Siege based on player count.
7.6
2,197
586
1,149
players
4. Tower Dominion
Similarity 43% Build and design the terrain while defending your stronghold against alien invasion in this unique Roguelike tower defense. Choose from 30 heroes, survive enemy waves, and upgrade a variety of destructive towers to hold the line! Tower Dominion is a tower defense, strategy and base-building game developed and published by Parallel 45 Games. Released on May 07th 2025 has received 1,843 reviews of which 1,539 were positive and 304 were negative resulting in a rating of 8 out of 10. With 1,085 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Outpost: Infinity Siege.
8
1,539
304
1,085
players
5. Oddsparks: An Automation Adventure
Similarity 45% Oddsparks is a blend of automation and real-time strategy for both the die-hard fans of the automation genre and the automation-curious. Explore a strange fantasy world, uncover the mysteries of the past, automate your workshops, and go on adventures with your odd & adorable Sparks! Oddsparks: An Automation Adventure is a building, singleplayer and co-op game developed by Massive Miniteam and published by HandyGames. Released on May 27th 2025 has received 1,591 reviews of which 1,389 were positive and 202 were negative resulting in a rating of 8.3 out of 10. With 751 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Outpost: Infinity Siege.
8.3
1,389
202
751
players
6. Mindustry
Similarity 57% 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 22,266 reviews of which 21,329 were positive and 937 were negative resulting in an impressive rating of 9.4 out of 10. With 582 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Outpost: Infinity Siege.
9.4
21,329
937
582
players
7. The Perfect Tower II
Similarity 40% The Perfect Tower II is a mix between an incremental and a tower defense game. Build a town, manage resources and explore a variety of mini-games and tons of upgrades. Fully automate your game and watch numbers going up! The Perfect Tower II is a strategy, idler and tower defense game developed and published by Fire Sword Studios. Released on February 26th 2021 has received 3,639 reviews of which 3,201 were positive and 438 were negative resulting in a rating of 8.5 out of 10. With 530 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Outpost: Infinity Siege.
8.5
3,201
438
530
players
8. Generation Zero®
Similarity 45% Generation Zero is a stealth-action shooter where you wage guerilla warfare against lethal mechanical enemies. Explore a vast open world map inspired by the Swedish Cold War era, take part in the resistance alone or with up to three friends in seamless co-op. Generation Zero® is a open world, survival and co-op game developed by Systemic Reaction™ and published by Avalanche Studios. Released on March 26th 2019 has received 40,504 reviews of which 29,053 were positive and 11,451 were negative resulting in a rating of 7.1 out of 10. With 328 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Outpost: Infinity Siege.
7.1
29,053
11,451
328
players
9. Supreme Commander 2
Similarity 43% Includes 47 Steam achievements, leaderboards, and stats! Supreme Commander 2 is a strategy, rts and sci-fi game developed by Gas Powered Games and published by Square Enix. Released on March 01st 2010 has received 12,431 reviews of which 10,975 were positive and 1,456 were negative resulting in a rating of 8.6 out of 10. With 253 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Outpost: Infinity Siege.
8.6
10,975
1,456
253
players
10. Emberward
Similarity 42% Build twisting mazes with tetromino blocks and deploy unique towers in this engaging roguelite tower defense game! Emberward is a early access, tower defense and strategy game developed and published by Refic Games. Released on June 25th 2024 has received 2,685 reviews of which 2,609 were positive and 76 were negative resulting in an impressive rating of 9.3 out of 10. With 242 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Outpost: Infinity Siege.
9.3
2,609
76
242
players
Best deals on games like Outpost: Infinity Siege on Steam
Discover fantastic savings with the best discounts on a variety of games like Outpost: Infinity Siege 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 Outpost: Infinity Siege.
1. DG2: Defense Grid 2
Similarity 40% 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. Featuring a massive 98% discount, this game currently holds the #1 spot in the best deals for games like Outpost: Infinity Siege.
8.3
2,723
440
-98%
12.49€
0.26€
2. Main Assembly
Similarity 42% You’re the designer, engineer and architect if you can imagine it you can create it! Construct robots of any shape or size from eight-legged spider bots to eerie UFO contraptions. Main Assembly is a 3d, online co-op and co-op game developed by Bad Yolk Games and published by Team17. Released on January 26th 2021 has received 1,314 reviews of which 1,115 were positive and 199 were negative resulting in a rating of 8.1 out of 10. Thanks to its incredible 98% discount, this game is now the #2 best deal in games like Outpost: Infinity Siege.
8.1
1,115
199
-98%
19.99€
0.43€
3. Sanctum 2
Similarity 49% Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence. Sanctum 2 is a tower defense, fps and co-op game developed by Coffee Stain Studios and published by Coffee Stain Publishing. Released on May 15th 2013 has received 14,291 reviews of which 12,856 were positive and 1,435 were negative resulting in a rating of 8.8 out of 10. Thanks to its incredible 94% discount, this game is now the #3 best deal in games like Outpost: Infinity Siege.
8.8
12,856
1,435
-94%
14.99€
0.97€
4. shapez
Similarity 40% shapez is an easy-going, minimalistic factory building game about the automation of shapes through extraction and satisfying production lines. Adapt to increasingly complex shapes and grow your factory across an infinitely expanding map. Your only limitation is your creativity! shapez is a automation, base-building and resource management game developed by Tobias Springer and published by tobspr Games and Doyoyo Games. Released on June 07th 2020 has received 13,681 reviews of which 13,165 were positive and 516 were negative resulting in an impressive rating of 9.4 out of 10. Currently offered at a significant 91% discount, this title has earned the #4 position in the best deals for games like Outpost: Infinity Siege.
9.4
13,165
516
-91%
9.99€
0.92€
5. shapez
Similarity 40% shapez is an easy-going, minimalistic factory building game about the automation of shapes through extraction and satisfying production lines. Adapt to increasingly complex shapes and grow your factory across an infinitely expanding map. Your only limitation is your creativity! shapez is a game developed and published by . Released on June 07th 2020 has received 13,681 reviews of which 13,165 were positive and 516 were negative resulting in an impressive rating of 9.4 out of 10. Currently offered at a significant 91% discount, this title has earned the #5 position in the best deals for games like Outpost: Infinity Siege.
9.4
13,165
516
-91%
9.99€
0.92€
6. Main Assembly
Similarity 42% You’re the designer, engineer and architect if you can imagine it you can create it! Construct robots of any shape or size from eight-legged spider bots to eerie UFO contraptions. Main Assembly is a game developed and published by . Released on January 26th 2021 has received 1,314 reviews of which 1,115 were positive and 199 were negative resulting in a rating of 8.1 out of 10. Currently offered at a significant 98% discount, this title has earned the #6 position in the best deals for games like Outpost: Infinity Siege.
8.1
1,115
199
-98%
19.99€
0.43€
7. Eximius: Seize the Frontline
Similarity 40% EXIMIUS is a FPS/RTS hybrid that focuses on squad-based combat. The game features an intense 5v5 multiplayer experience with each team comprising of 4 Squad Officers and one Commander. Eximius: Seize the Frontline is a team-based, 3d and isometric game developed and published by Ammobox Studios. Released on March 16th 2021 has received 719 reviews of which 531 were positive and 188 were negative resulting in a rating of 7.1 out of 10. Currently offered at a significant 84% discount, this title has earned the #7 position in the best deals for games like Outpost: Infinity Siege.
7.1
531
188
-84%
19.50€
3.24€
8. Main Assembly
Similarity 42% You’re the designer, engineer and architect if you can imagine it you can create it! Construct robots of any shape or size from eight-legged spider bots to eerie UFO contraptions. Main Assembly is a game developed and published by . Released on January 26th 2021 has received 1,314 reviews of which 1,115 were positive and 199 were negative resulting in a rating of 8.1 out of 10. Currently offered at a significant 98% discount, this title has earned the #8 position in the best deals for games like Outpost: Infinity Siege.
8.1
1,115
199
-98%
19.99€
0.43€
9. Mindustry
Similarity 57% 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 22,266 reviews of which 21,329 were positive and 937 were negative resulting in an impressive rating of 9.4 out of 10. Currently offered at a significant 76% discount, this title has earned the #9 position in the best deals for games like Outpost: Infinity Siege.
9.4
21,329
937
-76%
9.99€
2.43€
10. Supreme Commander 2
Similarity 43% Includes 47 Steam achievements, leaderboards, and stats! Supreme Commander 2 is a strategy, rts and sci-fi game developed by Gas Powered Games and published by Square Enix. Released on March 01st 2010 has received 12,431 reviews of which 10,975 were positive and 1,456 were negative resulting in a rating of 8.6 out of 10. Currently offered at a significant 76% discount, this title has earned the #10 position in the best deals for games like Outpost: Infinity Siege.
8.6
10,975
1,456
-76%
12.99€
3.17€
Free games like Outpost: Infinity Siege on Steam
Check out this fantastic list of free-to-play games like Outpost: Infinity Siege 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 Outpost: Infinity Siege.
1. The Perfect Tower II
Similarity 40% The Perfect Tower II is a mix between an incremental and a tower defense game. Build a town, manage resources and explore a variety of mini-games and tons of upgrades. Fully automate your game and watch numbers going up! The Perfect Tower II is a strategy, idler and tower defense game developed and published by Fire Sword Studios. Released on February 26th 2021 has received 3,639 reviews of which 3,201 were positive and 438 were negative resulting in a rating of 8.5 out of 10. With 530 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Outpost: Infinity Siege.
8.5
3,201
438
530
players
2. Vectorio Classic
Similarity 48% The original, uncompleted version of Vectorio. Claim resources, unlock new buildings, and expand your defenses as you fight back against enemy forces in the classic edition of Vectorio! Play for free now. Vectorio Classic is a base-building, tower defense and survival game developed by Ben Nichols and published by BN Games. Released on March 22nd 2021 has received 1,468 reviews of which 1,371 were positive and 97 were negative resulting in a rating of 8.9 out of 10. The game currently holds the #2 spot among the most played free games like Outpost: Infinity Siege.
8.9
1,371
97