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SIMILAR GAMES

Games like Outpost: Infinity Siege

Enjoyed Outpost: Infinity Siege? Here are 6 games that play in a similar way – such as Sanctum 2, Iron Brigade, FortressCraft Evolved!. Each shows the cheapest key price from the stores we compare.

About Outpost: Infinity Siege: Outpost: Infinity Siege is an action strategy game in which you command a mobile Outpost and push with the XEN Firearm into the Signet surveillance off-limit area. It blends first-person shooting, tower defence and base building: you explore the world, gather resources, and merge and upgrade outpost units so that your base fights alongside you. The XEN Firearm offers different protoslag attributes and ammunition with varied performance. In co-op you can fight alongside friends on Recovery Day, or hold out against endless waves of monsters in Endless mode.

Updated 12 Nov 2026, 00:00 UTC · similar games are picked by AI from our catalogue based on game content (play style, setting, co-op) · descriptions based on official publisher information on Steam

About these games

Sanctum 2

Sanctum 2 is the follow-up to the game that first merged tower defense with a first-person shooter. Players pick one of four character classes and set out to guard oxygen-producing Cores against hordes of deadly aliens that see their existence as a threat. In the building phase you place towers and walls, then join the fight yourself and shoot in first person. An extensive customization system lets you choose your own towers, weapons and perks, while progression unlocks new gear. The campaign can be played solo or with up to four players in co-op as you uncover the secrets of the planet LOEK III.

Iron Brigade

Iron Brigade is a tower defence shooter from Tim Schafer’s Double Fine Productions. Join The Mobile Trench Brigade and defend humanity from the Monovision menace, combining mobile firepower with stationary defences and customising your trench from thousands of possible loadouts. Alongside allies from around the world you fight in Europe, Africa and the Pacific. In Iron Brigade: Rise of the Martian Bear you face Vlad’s horrific new Monovision Constructs in a new Martian campaign, unlock over 80 new pieces of loot and battle the Tubes in four defence missions, two survival missions and one all-new mission.

FortressCraft Evolved!

FortressCraft Evolved blends voxel landscapes, tower defense, crafting, logistics, exploration, combat and assembly lines. Players crash-land on a strange alien world with only a handful of starting machines, using handheld scanners to find ore and automating its transport with Ore Extractors and conveyors to the Smelter. Fresh ingots move through multi-machine assembly lines, new technologies are researched, and power systems are built from Solar Energy to Jet Turbines. The game culminates in building the Orbital Energy Transmitter, which beams power off-planet, and it supports multiplayer.

Volcanoids

Volcanoids is an open-world survival shooter with base building, where a giant drillship replaces the usual base as your mobile fortress. You can play alone or with up to three crewmates while exploring a constantly changing volcanic island plagued by recurring eruptions, which you can survive by traveling underground. Along the way you gather resources, uncover new areas and secrets, and fight hostile mining robots on the surface and below, capturing their useful resources and technology while destroying the rest. You build, upgrade, automate and arm the drillship through successive technology tiers.

StarRupture

StarRupture is a first-person open world base-building game with advanced combat and extensive exploration. Players discover a mysterious planet that constantly changes and is torn apart by repeated cataclysms. They mine and process resources, build a complex industrial system and expand their base while defending it against hordes of alien creatures, either alone or in a group of up to four friends.

Mars or Die!

The game mixes roguelite and tower defense gameplay, and you control two characters at once. You survive, gather resources and upgrades, fight Martians of all sizes and build defensible outposts to conquer Mars. The campaign is split into 9 missions, and if the Martians put up a strong fight, Endless warfare is also available. Playable characters include Scout B. Bean of the Engineering Corps, equipped with an Energy Repulsion Shield, and Major B. Bob of the VI Assault Division.