Outpost: Infinity Siege Steam Altergift

Command Mobile Outpost and take XEN Firearm to venture deep into the Signet surveillance off-limit area. Collect unique Weapon Units.

Amp up the firepower of the Outpost that fights with you. This is a FTD game - FPS, Tower Defense Base Building and much more all at the same time.

Features Outpost BuildingExplore the world, gather resources, merge and upgrade outpost units to build your own outpost. Unique WeaponFully exploit the value of the unique Protoslag Gun with different protoslag attributes, and utilize ammunition with diverse performance.

Exploration and SurvivalEnjoy the abundant difficulty levels, diverse gameplay features, and distinctive maps of the exploration mode. Venture deep into the brand-new zones full of hazards and opportunities, and harvest powerful outpost units.

Co-op FeatureFight alongside friends on Harvest Days, or strive together to survive infinite waves of monsters in Endless mode till the last moment.