IMHO.

Free games like ZombieWave-UnlimitedChallenges

Below are 9 free-to-play Steam games similar to ZombieWave-UnlimitedChallenges, 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 ZombieWave-UnlimitedChallenges page.

Ranked picks

  1. 1
    Ultimate Custom Night — Steam game cover

    Ultimate Custom Night

    Free-to-play alternative to ZombieWave-UnlimitedChallenges — no purchase or trial window. Shares Action and Indie with ZombieWave-UnlimitedChallenges.

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

    2018ActionIndieFree To PlayFreeFree to playSimilar games →
  2. 2
    Indigo Park: Chapter 1 — Steam game cover

    Indigo Park: Chapter 1

    Free-to-play alternative to ZombieWave-UnlimitedChallenges — no purchase or trial window. Shares Action and Indie with ZombieWave-UnlimitedChallenges.

    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 ZombieWave-UnlimitedChallenges — no purchase or trial window. Shares Action with ZombieWave-UnlimitedChallenges.

    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
    Counter-Strike:Global Offensive — Steam game cover

    Counter-Strike:Global Offensive

    Free-to-play alternative to ZombieWave-UnlimitedChallenges — no purchase or trial window. Shares Action with ZombieWave-UnlimitedChallenges.

    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 →
  5. 5
    UNBEATABLE [white label] — Steam game cover

    UNBEATABLE [white label]

    Free-to-play alternative to ZombieWave-UnlimitedChallenges — no purchase or trial window. Shares Action and Indie with ZombieWave-UnlimitedChallenges.

    A young girl learns a song. An exclusive side-story set in the world of D-CELL GAMES' upcoming rhythm-adventure.

    2021ActionIndieAdventureFreeDeck PlayableFree to playSimilar games →
  6. 6
    The Lab — Steam game cover

    The Lab

    Free-to-play alternative to ZombieWave-UnlimitedChallenges — 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 →
  7. 7
    93, Kuindzhi — Steam game cover

    93, Kuindzhi

    Free-to-play alternative to ZombieWave-UnlimitedChallenges — no purchase or trial window. Shares Indie with ZombieWave-UnlimitedChallenges.

    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 →
  8. 8
    Hello Neighbor Alpha 2 — Steam game cover

    Hello Neighbor Alpha 2

    Free-to-play alternative to ZombieWave-UnlimitedChallenges — no purchase or trial window. Shares Strategy and Indie with ZombieWave-UnlimitedChallenges.

    Welcome to Alpha 2 of Hello Neighbor. Play against an advanced, self-learning AI in what eventually became Act 1 of Hello Neighbor - the stealth horror home invasion sim.

    2019StrategyIndieAdventureFreeFree to playSimilar games →
  9. 9
    Microsoft Allegiance — Steam game cover

    Microsoft Allegiance

    Free-to-play alternative to ZombieWave-UnlimitedChallenges — no purchase or trial window. Shares Action and Strategy with ZombieWave-UnlimitedChallenges.

    Allegiance is a team-based multiplayer space combat sim that seamlessly combines first-person space combat with a top-down-view perspective, real time strategy, and real time tactics. Team commanders build bases, research technology, and coordinate players to execute a wide range of strategies.

    2017ActionStrategySimulationFreeFree to playSimilar games →