Games like Outpost: Infinity Siege

Hooked on the replayable and tense side of Outpost: Infinity Siege? These games offer a similar pull for your backlog. You can bring friends along for most of these.

Cheaper than Outpost: Infinity Siege

Outpost

Outpost

this is a tower defence game,we need upgrade our weapons to fight waves of enemies,robots can mining diamonds,and we need spent those in many…

74% of 185 Steam reviews are positive$3.99
Keep Her Safe

Keep Her Safe

Scavenge guns, bolt them onto your base and hold off zombie hordes until the rocket flies.

88% of 611 Steam reviews are positivePlayers online now: 23$9.99
Artificial Extinction 2

Artificial Extinction 2

A Tower Defense hybrid where survival depends on strategy and firepower.

77% of 121 Steam reviews are positive$19.99
Colony Siege

Colony Siege

Colony Siege combines the best of RTS and tower defense, including base building, mazing, and unit physics.

91% of 199 Steam reviews are positive$19.99
Block Fortress 2

Block Fortress 2

Choose a planet, build your fortress, and prepare for war. Arm yourself with powerful weapons, deploy troops, construct turrets, and defend your…

82% of 270 Steam reviews are positivePlayers online now: 3$19.99
The Front

The Front

Gather, craft and fortify a base, then push back against the empire in first person, alone or with friends.

66% of 9,526 Steam reviews are positivePlayers online now: 45$19.99
IDUN - Frontline Survival

IDUN - Frontline Survival

A single-player defense RTS where your turrets are not stuck where you built them.

76% of 702 Steam reviews are positivePlayers online now: 5$14.99
outpost4

outpost4

Drive a cartoon outpost across hostile planets, defend it with drones and guns, and rebuild it stronger after every run.

75% of 127 Steam reviews are positivePlayers online now: 18$3.99
Ash & Adam's Existential Treads

Ash & Adam's Existential Treads

A mini action city-builder in a post-post-apocalyptic world. Grow your settlement. Fend off waves of enemies. Restore nature.

92% of 353 Steam reviews are positivePlayers online now: 2$6.99
Lumencraft

Lumencraft

Mine glowing Lumen in a fully destructible underground, build your base, and shoot back when the swarms come.

75% of 1,088 Steam reviews are positive$19.99
Sanctum 2

Sanctum 2

Design your defenses, then fight alongside them in first person on a bright, chaotic alien world.

92% of 7,462 Steam reviews are positivePlayers online now: 36$14.99
Alien Shooter TD

Alien Shooter TD

Innovative Tower Defense inspired by legendary Alien Shooter series!

84% of 677 Steam reviews are positivePlayers online now: 3$9.99

Hidden gems like Outpost: Infinity Siege

Ash & Adam's Existential Treads

Ash & Adam's Existential Treads

A mini action city-builder in a post-post-apocalyptic world. Grow your settlement. Fend off waves of enemies. Restore nature.

92% of 353 Steam reviews are positivePlayers online now: 2$6.99
Keep Her Safe

Keep Her Safe

Scavenge guns, bolt them onto your base and hold off zombie hordes until the rocket flies.

88% of 611 Steam reviews are positivePlayers online now: 23$9.99
GRAVHOUNDS

GRAVHOUNDS

Play as space dogs, haul loot with a gravity beam and escape the swarm before it takes everything back.

90% of 419 Steam reviews are positive$14.99
Olympius

Olympius

Take up arms for humanity's last rebellion, hack enemy drones to fight for you and reclaim a ruined planet mission by mission.

87% of 256 Steam reviews are positivePlayers online now: 38$17.99
The Ember Guardian

The Ember Guardian

Defend the embers of hope in this roguelike strategy game set in a post-apocalyptic world.

81% of 297 Steam reviews are positivePlayers online now: 5$19.99
Block Fortress 2

Block Fortress 2

Choose a planet, build your fortress, and prepare for war. Arm yourself with powerful weapons, deploy troops, construct turrets, and defend your…

82% of 270 Steam reviews are positivePlayers online now: 3$19.99
Ultimate Zombie Defense 2

Ultimate Zombie Defense 2

Team up with up to three friends, fortify your base between waves and blast through the undead with customized guns.

77% of 615 Steam reviews are positivePlayers online now: 29$9.99
Artificial Extinction 2

Artificial Extinction 2

A Tower Defense hybrid where survival depends on strategy and firepower.

77% of 121 Steam reviews are positive$19.99
outpost4

outpost4

Drive a cartoon outpost across hostile planets, defend it with drones and guns, and rebuild it stronger after every run.

75% of 127 Steam reviews are positivePlayers online now: 18$3.99
SENTRY

SENTRY

Defend your spaceship from alien boarders with guns, traps and blast doors while plotting your escape through hostile space.

82% of 867 Steam reviews are positivePlayers online now: 15$15.99
Signal Zone

Signal Zone

Defend your base against increasingly dangerous enemy waves each night in this minimalist survival strategy.

76% of 103 Steam reviews are positive$11.99
IDUN - Frontline Survival

IDUN - Frontline Survival

A single-player defense RTS where your turrets are not stuck where you built them.

76% of 702 Steam reviews are positivePlayers online now: 5$14.99

Newest games like Outpost: Infinity Siege

GRAVHOUNDS

GRAVHOUNDS

Play as space dogs, haul loot with a gravity beam and escape the swarm before it takes everything back.

90% of 419 Steam reviews are positive$14.99
Olympius

Olympius

Take up arms for humanity's last rebellion, hack enemy drones to fight for you and reclaim a ruined planet mission by mission.

87% of 256 Steam reviews are positivePlayers online now: 38$17.99
Keep Her Safe

Keep Her Safe

Scavenge guns, bolt them onto your base and hold off zombie hordes until the rocket flies.

88% of 611 Steam reviews are positivePlayers online now: 23$9.99
outpost4

outpost4

Drive a cartoon outpost across hostile planets, defend it with drones and guns, and rebuild it stronger after every run.

75% of 127 Steam reviews are positivePlayers online now: 18$3.99
Artificial Extinction 2

Artificial Extinction 2

A Tower Defense hybrid where survival depends on strategy and firepower.

77% of 121 Steam reviews are positive$19.99
Ash & Adam's Existential Treads

Ash & Adam's Existential Treads

A mini action city-builder in a post-post-apocalyptic world. Grow your settlement. Fend off waves of enemies. Restore nature.

92% of 353 Steam reviews are positivePlayers online now: 2$6.99
BastionOS

BastionOS

A short active incremental game where you stack ludicrous weapons and upgrades onto a tower.

96% of 178 Steam reviews are positive$3.30
The Ember Guardian

The Ember Guardian

Defend the embers of hope in this roguelike strategy game set in a post-apocalyptic world.

81% of 297 Steam reviews are positivePlayers online now: 5$19.99
Signal Zone

Signal Zone

Defend your base against increasingly dangerous enemy waves each night in this minimalist survival strategy.

76% of 103 Steam reviews are positive$11.99
EverSiege: Untold Ages

EverSiege: Untold Ages

Defend your city, then turn the tide: fuse weapons, summon troops and push back through shifting timelines, alone or with friends.

68% of 1,962 Steam reviews are positivePlayers online now: 31$19.99
Ultimate Zombie Defense 2

Ultimate Zombie Defense 2

Team up with up to three friends, fortify your base between waves and blast through the undead with customized guns.

77% of 615 Steam reviews are positivePlayers online now: 29$9.99
The Front

The Front

Gather, craft and fortify a base, then push back against the empire in first person, alone or with friends.

66% of 9,526 Steam reviews are positivePlayers online now: 45$19.99