IMHO.

Free games like Tower & Invasion

Below are 9 free-to-play Steam games similar to Tower & Invasion, 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 Tower & Invasion page.

Ranked picks

  1. 1
    Ultimate Custom Night — Steam game cover

    Ultimate Custom Night

    Free-to-play alternative to Tower & Invasion — no purchase or trial window. Shares Action and Indie with Tower & Invasion.

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

    2018ActionIndieFree To PlayFreeFree to playSimilar games →
  2. 2
    Bongo Cat — Steam game cover

    Bongo Cat

    Free-to-play alternative to Tower & Invasion — no purchase or trial window. Shares Indie and Simulation with Tower & Invasion.

    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 →
  3. 3
    Indigo Park: Chapter 1 — Steam game cover

    Indigo Park: Chapter 1

    Free-to-play alternative to Tower & Invasion — no purchase or trial window. Shares Action and Indie with Tower & Invasion.

    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 →
  4. 4
    STRAFTAT — Steam game cover

    STRAFTAT

    Free-to-play alternative to Tower & Invasion — no purchase or trial window. Shares Action with Tower & Invasion.

    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 →
  5. 5
    Awaria — Steam game cover

    Awaria

    Free-to-play alternative to Tower & Invasion — no purchase or trial window. Shares Action and Indie with Tower & Invasion.

    Awaria is a short game about working in haunted maintenance tunnels.

    2024ActionIndieFree To PlayFreeDeck PlayableFree to playSimilar games →
  6. 6
    Virtual Cottage — Steam game cover

    Virtual Cottage

    Free-to-play alternative to Tower & Invasion — no purchase or trial window. Shares Indie and Simulation with Tower & Invasion.

    Virtual Cottage gives you a comfy place to rest and be productive without any distractions. Open the game, set yourself a goal and enjoy the atmosphere.

    2020IndieSimulationFree To PlayFreeDeck PlayableFree to playSimilar games →
  7. 7
    The Expendabros — Steam game cover

    The Expendabros

    Free-to-play alternative to Tower & Invasion — no purchase or trial window. Shares Action and Indie with Tower & Invasion.

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

    2014ActionIndieAdventureFreeDeck VerifiedFree to playSimilar games →
  8. 8
    Steam Engine Simulator — Steam game cover

    Steam Engine Simulator

    Free-to-play alternative to Tower & Invasion — no purchase or trial window. Shares Simulation with Tower & Invasion.

    The Steam Engine Simulator shown on AngeTheGreat's YouTube channel.

    2023SimulationFreeDeck VerifiedFree to playSimilar games →
  9. 9
    Whispers of the Architects — Steam game cover

    Whispers of the Architects

    Free-to-play alternative to Tower & Invasion — no purchase or trial window. Shares Strategy and Indie with Tower & Invasion.

    Echoes of the Architects is a fast-paced real-time strategy game where creativity drives victory. Design modular, programmable units to build your perfect army. Adapt and outsmart your opponents in dynamic skirmishes that reward tactical precision, ingenuity, and strategic mastery.

    2025StrategyIndieSimulationFreeFree to playSimilar games →