IMHO.

Free games like Killer: Infected One of Us

Below are 11 free-to-play Steam games similar to Killer: Infected One of Us, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.

Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Killer: Infected One of Us page.

Ranked picks

  1. 1
    Bongo Cat — Steam game cover

    Bongo Cat

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window. Shares Indie and Massively Multiplayer with Killer: Infected One of Us.

    Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?

    2025IndieSimulationMassively MultiplayerFreeDeck PlayableFree to playSimilar games →
  2. 2
    Indigo Park: Chapter 1 — Steam game cover

    Indigo Park: Chapter 1

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window. Shares Indie with Killer: Infected One of Us.

    Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.

    2024ActionIndieAdventureFreeDeck PlayableFree to playSimilar games →
  3. 3
    STRAFTAT — Steam game cover

    STRAFTAT

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window.

    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 PlayableFree to playSimilar games →
  4. 4
    The Looker — Steam game cover

    The Looker

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window. Shares Indie with Killer: Infected One of Us.

    You wake up, alone, on a strangely familiar island full of puzzles that will frustrate and annoy you.

    2022IndieFreeDeck PlayableFree to playSimilar games →
  5. 5
    Counter-Strike:Global Offensive — Steam game cover

    Counter-Strike:Global Offensive

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window.

    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 PlayableFree to playSimilar games →
  6. 6
    Eternal Senia — Steam game cover

    Eternal Senia

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window. Shares Indie with Killer: Infected One of Us.

    Thoughts and expectations ARPG

    2015ActionIndieRPGFreeDeck PlayableFree to playSimilar games →
  7. 7
    The Lab — Steam game cover

    The Lab

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window.

    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 PlayFreeFree to playSimilar games →
  8. 8
    93, Kuindzhi — Steam game cover

    93, Kuindzhi

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window. Shares Indie with Killer: Infected One of Us.

    Kuindzhi, 93 is an atmospheric first-person narrative vignette about an 18-year-old boy from Donbas. The story takes us to March 2022, when the world changed forever — into a space where the past, fears, and doubts find their voice.

    2026IndieAdventureFree To PlayFreeFree to playSimilar games →
  9. 9
    Imposters: Countdown — Steam game cover

    Imposters: Countdown

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window. Shares Casual with Killer: Infected One of Us.

    Complete tasks & mini-games. Report bodies. Call voting sessions. Hack the station. Overload the reactor. Betray your friends. An online party game of teamwork and betrayal for 4-12 players...in third person! Escape the ship before the countdown runs out! Don't get fooled by the rogue AI.

    2023CasualFreeDeck PlayableFree to playSimilar games →
  10. 10
    Castle of Blackwater — Steam game cover

    Castle of Blackwater

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window. Shares Indie with Killer: Infected One of Us.

    Castle of Blackwater is a 2D, action-packed, social deduction game with a magical twist. In this intense game of trust and betrayal, up to 10 strangers are trapped in a castle of danger and deception, with a mission to complete tasks and escape with their lives.

    2025ActionStrategyIndieFreeFree to playSimilar games →
  11. 11
    Suspect Enemy — Steam game cover

    Suspect Enemy

    Free-to-play alternative to Killer: Infected One of Us — no purchase or trial window. Shares Indie with Killer: Infected One of Us.

    Team game for 4-10 people in which there is a killer and crewmate.

    2022ActionSportsStrategyFreeFree to playSimilar games →