Outpost: Infinity Siege

My first hour with Outpost: Infinity Siege felt like someone had stapled four unfinished games together and dared me to love it anyway. The concept is genuinely unusual: a per-mission loop that splits between FPS exploration runs and a tower defense siege phase where your mobile outpost, bristling with turrets and automated cannons, absorbs waves of robotic enemies called Mechanos. You scavenge zones for scrap and blueprints, return to base, slot in armored walls, machine guns, heavy artillery, and ammo production lines, then watch the carnage unfold while you personally sprint between defense points firing the XEN Firearm. When it clicks, it clicks hard. The base-building layer is where the strategy depth lives. You are not passively placing turrets on a fixed map. You are configuring an entire mobile fortress, researching tech trees, merging and upgrading Weapon Units, managing energy and scrap economies, and recruiting characters with randomized skill trees that function almost like a gacha system without the cash shop - a notable win given the genre. Tour mode, which is the main campaign progression, drops you onto a map of locations and lets you choose your route. Endless mode is a pure wave-survival test that gets genuinely hectic and is substantially better with three co-op partners covering different defense sectors. Here is the honest problem set. The tutorial is thin and the UI is cluttered in ways that feel unexamined. Ammo management, turret linking, and tech tree dependencies are not explained; community guides fill the gap that onboarding should have covered. The exploration phases in Tour mode also front-load the grind badly. Early runs involve a lot of quiet looting across repetitive environments with sparse enemy contact, and the pacing only rewards you after roughly ten hours when the base starts feeling like an actual fortress. The story campaign, voiced with some of the flattest delivery in recent memory, also ends abruptly before a final act that was apparently cut from development, leaving a structural hole that genuinely stings for players who invested sixty-plus hours in the narrative. The development status is the elephant in the room for anyone buying today. Community sentiment shifted notably in late 2024 and into 2025, with players pointing to a lack of updates and the missing campaign conclusion as signs the title may be in maintenance mode. The overall Steam score sits in mixed territory across a large review pool, and the concurrent player count has dropped far from its launch peak. That context matters. You are buying a game that is likely done receiving major feature work, and you should set expectations accordingly. What exists is a dense, idiosyncratic hybrid that rewards players willing to build mental models of interconnected systems, but it will not be patched into something it currently is not. For a certain type of player, specifically someone who likes customizing interconnected defensive systems, tolerates RNG-driven loot progression, and has a friend or two to run Endless mode with, this is a genuinely strange and absorbing time sink. Approach it as a complete-if-uneven package rather than an ongoing live game, lean on community guides early, and the mechanical depth will carry you well past the rough surface. Diego, Scout Team

Valve rates this game Steam Deck Unsupported. Runs flawlessly on Linux out of the box. Based on 10 ProtonDB community reports.

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