IMHO.

Games like Outpost: Infinity Siege

If Outpost: Infinity Siege is your kind of game, the closest matches are Per Aspera, Roboden and The Riftbreaker — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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Outpost: Infinity Siege is a post-apocalyptic action-strategy hybrid developed by Team Ranger and published by Lightning Games, released in 2024 at $24.99. The game combines first-person shooter gunplay with tower defense and base-building mechanics, tasking players with commanding mobile outposts while collecting weapon units to enhance their defensive installations. Set in a sci-fi world of robot enemies and surveillance-restricted zones, players engage in resource management and strategic positioning across extended sessions. The game supports online co-op and presents a challenging experience requiring tactical thinking. According to Steam reviews, the title holds 72% positive reception from over 2,500 players. It does not currently support Steam Deck play.

About Outpost: Infinity Siege: 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 an FTD game - FPS, Tower Defense, Base Building and much more all at the same time.

2024ActionStrategy24.99 USDWindowsby Team Ranger
Outpost: Infinity Siege — Steam game cover

Players who liked Outpost: Infinity Siege also play

Steam players who put hours into Outpost: Infinity Siege also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. Per Aspera

    WHY THIS

    Top pick for Outpost: Infinity Siege fans by collaborative filtering across millions of Steam libraries. Shares Strategy with Outpost: Infinity Siege.

    Make Mars your own! Take control of the world’s most sophisticated AI (AMI) and terraform the surface of the Red Planet for a city-building experience on a planetary scale. Transform this barren world into a lush paradise and explore the surface for any ancient secrets that may be waiting.

    2020StrategyIndieSimulation29.99 USDDeck PlayableSteam ↗
  2. Roboden

    WHY THIS

    Second-strongest match for Outpost: Infinity Siege fans by collaborative filtering across millions of Steam libraries. Shares Strategy with Outpost: Infinity Siege.

    Roboden is a fresh take on the RTS genre: less micro-control tedium with more units!

    2023Strategy3.29 USDDeck VerifiedSteam ↗
  3. The Riftbreaker

    WHY THIS

    Third-strongest match for Outpost: Infinity Siege fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with Outpost: Infinity Siege.

    The Riftbreaker is a solo or Co-op base-building, survival game with Action-RPG elements for up to 4 players. Hack & slash countless hordes of enemies. Build up your base, craft powerful weapons and research new inventions to survive.

    2021ActionStrategyIndie11.99 USDDeck PlayableSteam ↗
  4. Out of Ammo

    WHY THIS

    Ranked #4 for Outpost: Infinity Siege fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with Outpost: Infinity Siege.

    Out of Ammo is an intense VR Tower Defense / FPS hybrid strategy game that will have you constructing defenses, calling in artillery, issuing orders, and taking direct control of your soldiers in order to survive a relentless enemy onslaught.

    2016ActionStrategyIndie9.99 USDSteam ↗
  5. Mindustry

    WHY THIS

    Ranked #5 for Outpost: Infinity Siege fans by collaborative filtering across millions of Steam libraries. Shares Strategy with Outpost: Infinity Siege.

    An open-ended factory management game with RTS and tower defense elements.

    2019Strategy9.99 USDDeck PlayableSteam ↗
  6. Vectorio

    WHY THIS

    Ranked #6 for Outpost: Infinity Siege fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with Outpost: Infinity Siege.

    Build. Automate. Defend.

    2023ActionStrategyIndie9.99 USDDeck PlayableSteam ↗
  7. Golemworks

    WHY THIS

    Ranked #7 for Outpost: Infinity Siege fans by collaborative filtering across millions of Steam libraries. Shares Strategy with Outpost: Infinity Siege.

    A strategic fusion of automation game and tower defense

    2026StrategyIndieCasual6.99 USDDeck PlayableSteam ↗
  8. Armed to the Gears

    WHY THIS

    Ranked #8 for Outpost: Infinity Siege fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with Outpost: Infinity Siege.

    Control a fully armed Mech and fight through cyberpunk cities, military bases and industrial ruins. Capture and defend territories, build turrets and structures, and wage war against powerful enemies!

    2020ActionStrategyIndie4.99 USDSteam ↗

Reviewers mention these as similar to Outpost: Infinity Siege

Surfaced from review text: when other players write 'if you liked X, try Y', we catch the name and resolve it back to a Steam game.

  1. Orcs Must Die!

    WHY THIS

    Reviewers of Outpost: Infinity Siege cross-mention this title as a similar play. Shares Action and Strategy with Outpost: Infinity Siege.

    Slice them, burn them, skewer them, and launch them - no matter how you get it done, orcs must die in this fantasy action-strategy game from Robot Entertainment.

    2011ActionStrategyIndie9.99 USDDeck PlayableSteam ↗
  2. Escape from Tarkov

    WHY THIS

    Reviewers of Outpost: Infinity Siege cross-mention this title as a similar play. Shares Action with Outpost: Infinity Siege.

    Escape from Tarkov is the original extraction FPS where every raid is a gamble with death. Prep your raid, bleed, endure and fight through ruthless PMC players and Scavs, gain tactical advantage and cling to your loot — only extraction decides if you live or lose it all.

    2025ActionSimulationMassively Multiplayer49.99 USDSteam ↗
  3. The Riftbreaker

    WHY THIS

    Reviewers of Outpost: Infinity Siege cross-mention this title as a similar play. Shares Action and Strategy with Outpost: Infinity Siege.

    The Riftbreaker is a solo or Co-op base-building, survival game with Action-RPG elements for up to 4 players. Hack & slash countless hordes of enemies. Build up your base, craft powerful weapons and research new inventions to survive.

    2021ActionStrategyIndie11.99 USDDeck PlayableSteam ↗
  4. The Last Spell

    WHY THIS

    Reviewers of Outpost: Infinity Siege cross-mention this title as a similar play. Shares Action and Strategy with Outpost: Infinity Siege.

    Defend the last bastion of humanity with your squad of heroes! Exterminate fiendish monsters with magic and brute force by night and re-build your battered city defenses by day in this tactical RPG with rogue-lite mechanics.

    2023ActionStrategyIndie24.99 USDDeck VerifiedSteam ↗
  5. RimWorld

    WHY THIS

    Reviewers of Outpost: Infinity Siege cross-mention this title as a similar play. Shares Strategy with Outpost: Infinity Siege.

    A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.

    2018StrategyIndieSimulation34.99 USDDeck VerifiedSteam ↗
  6. Diplomacy is Not an Option

    WHY THIS

    Reviewers of Outpost: Infinity Siege cross-mention this title as a similar play. Shares Action and Strategy with Outpost: Infinity Siege.

    Diplomacy is Not an Option is a strategy game set in a medieval fantasy world. Build your town and defenses, raise huge armies and fight against massive hordes of enemies. How long can you survive?

    2024ActionStrategyIndie29.99 USDDeck PlayableSteam ↗
  7. Cataclismo

    WHY THIS

    Reviewers of Outpost: Infinity Siege cross-mention this title as a similar play. Shares Strategy with Outpost: Infinity Siege.

    Design and build fortresses brick by brick to stand against endless hordes of Horrors in this real-time strategy game with resource management, siege defense, and exploration. Lead from the ramparts, push back the darkness, and hold fast against the creatures of the Mist.

    2025StrategySimulation29.99 USDDeck PlayableSteam ↗
  8. From Glory To Goo

    WHY THIS

    Reviewers of Outpost: Infinity Siege cross-mention this title as a similar play. Shares Strategy with Outpost: Infinity Siege.

    From Glory To Goo is a Sci-Fi survival RTS set on an alien world. Serve as humanity's bulwark by establishing a colony and supporting your colonists still in orbit. But beware, for The Goo, a relentless and shape-shifting force approaches from all sides, even above and below.

    2024StrategySimulationEarly Access8.39 USDDeck PlayableSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below Outpost: Infinity Siege at current Steam store prices.

  1. Terraria

    WHY THIS

    Priced ~60% under Outpost: Infinity Siege on Steam right now. Shares Action with Outpost: Infinity Siege.

    Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!

    2011ActionIndieAdventure9.99 USDDeck VerifiedSteam ↗
  2. Lethal Company

    WHY THIS

    Priced ~60% under Outpost: Infinity Siege on Steam right now. Shares Action with Outpost: Infinity Siege.

    A co-op horror about scavenging at abandoned moons to sell scrap to the Company.

    2023ActionIndieAdventure9.99 USDDeck PlayableSteam ↗
  3. Left 4 Dead 2

    WHY THIS

    Priced ~60% under Outpost: Infinity Siege on Steam right now. Shares Action with Outpost: Infinity Siege.

    Set in the zombie apocalypse, Left 4 Dead 2 is a co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.

    2009Action9.99 USDDeck VerifiedSteam ↗
  4. Bloons TD 6

    WHY THIS

    Priced ~44% under Outpost: Infinity Siege on Steam right now. Shares Strategy with Outpost: Infinity Siege.

    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.

    2018Strategy13.99 USDDeck PlayableSteam ↗
  5. People Playground

    WHY THIS

    Priced ~60% under Outpost: Infinity Siege on Steam right now. Shares Action with Outpost: Infinity Siege.

    Shoot, stab, burn, poison, tear, vaporise, or crush ragdolls in a large open space.

    2019ActionIndieSimulation9.99 USDDeck PlayableSteam ↗
  6. Portal 2

    WHY THIS

    Priced ~60% under Outpost: Infinity Siege on Steam right now. Shares Action with Outpost: Infinity Siege.

    The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!

    2011ActionAdventure9.99 USDDeck VerifiedSteam ↗
  7. Fallout: New Vegas

    WHY THIS

    Priced ~60% under Outpost: Infinity Siege on Steam right now. Shares Action with Outpost: Infinity Siege.

    Welcome to Vegas. New Vegas. Enjoy your stay!

    2010ActionRPG9.99 USDDeck PlayableSteam ↗
  8. Vampire Survivors

    WHY THIS

    Priced ~80% under Outpost: Infinity Siege on Steam right now. Shares Action with Outpost: Infinity Siege.

    Mow down thousands of night creatures and survive until dawn! Vampire Survivors is a gothic horror casual game with rogue-lite elements, where your choices can allow you to quickly snowball against the hundreds of monsters that get thrown at you. Be the bullet hell!

    2022ActionIndieRPG4.99 USDDeck VerifiedSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Ultimate Custom Night

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Outpost: Infinity Siege.

    Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!

    2018ActionIndieFree To PlayFreeSteam ↗
  2. STRAFTAT

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Outpost: Infinity Siege.

    STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.

    2024ActionFreeDeck PlayableSteam ↗
  3. Counter-Strike:Global Offensive

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Outpost: Infinity Siege.

    Counter-Strike:Global Offensive (CS:GO) expands upon the team-based action gameplay that it pioneered when it was launched over 2 decades ago. CS:GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).

    2012ActionFree To PlayFreeDeck PlayableSteam ↗
  4. The Expendabros

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Outpost: Infinity Siege.

    The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.

    2014ActionIndieAdventureFreeDeck VerifiedSteam ↗
  5. Iron Snout

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Outpost: Infinity Siege.

    Iron Snout is a fast, colorful and brutal fighting game in which you will be helping a piglet fight for its life against hordes of wolves.

    2016ActionIndieFree To PlayFreeDeck PlayableSteam ↗
  6. The Lab

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it.

    Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free!

    2016Free To PlayFreeSteam ↗
  7. DORONKO WANKO

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Outpost: Infinity Siege.

    『DORONKO WANKO』 is a DORONKO Action Game. In this game, You can become a cute, innocent Pomeranian, make your master's home messy and dirty. "Will the master be angry with me?" Don't worry. Because you are a sweet doggie.

    2024ActionSimulationFree To PlayFreeSteam ↗
  8. Outpath: First Journey

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it.

    Outpath: First Journey is a prologue chapter of the main game, Outpath. An experimental clicker base building game. Craft, gather & manage resources, build your base and buy more islands to exploit and expand!

    2022IndieAdventureCasualFreeDeck PlayableSteam ↗

Frequently asked about Outpost: Infinity Siege

Does Outpost: Infinity Siege work on Steam Deck?
Outpost: Infinity Siege is currently rated Unsupported on Steam Deck. It may not launch or may have significant issues that block normal play.
How much does Outpost: Infinity Siege cost?
Outpost: Infinity Siege is listed on Steam at 24.99 USD (current store price; Steam sales may reduce this temporarily).
Does Outpost: Infinity Siege have multiplayer or co-op?
Yes — Outpost: Infinity Siege supports multi-player play according to its Steam store listing (Multi-player, Online Co-op, Co-op).
What games are most similar to Outpost: Infinity Siege?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Outpost: Infinity Siege are Per Aspera, Roboden, The Riftbreaker.
Who developed Outpost: Infinity Siege?
Outpost: Infinity Siege was developed by Team Ranger and published by Lightning Games.

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Outpost: Infinity Siege.

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