IMHO.

Free games like Circuit Keep

Below are 8 free-to-play Steam games similar to Circuit Keep, 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 Circuit Keep page.

Ranked picks

  1. 1
    Bloons TD Battles 2 — Steam game cover

    Bloons TD Battles 2

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

    From the creators of Bloons TD6... Bloons TD Battles 2 is a brand new installment of the top-rated head-to-head tower defense game. Gather your Hero, choose your team of powerful Monkey Towers, and prepare to battle one on one against other players and relentless waves of Bloons!

    2021ActionStrategyIndieFreeDeck PlayableFree to playSimilar games →
  2. 2
    Bloons TD Battles — Steam game cover

    Bloons TD Battles

    Free-to-play alternative to Circuit Keep — no purchase or trial window. Shares Strategy with Circuit Keep.

    Go head to head with other players in a Bloon-popping battle for victory. From the creators of best-selling Bloons TD 5, this all new Battles game is specially designed for multiplayer combat, featuring the ability to control bloons directly and send them charging past your opponent's defenses.

    2016ActionStrategyFree To PlayFreeDeck PlayableFree to playSimilar games →
  3. 3
    One-armed robber — Steam game cover

    One-armed robber

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

    One-armed robber is a chaotic first-person heist game that centers around a uniquely challenging premise. Players take the role of a determined robber equipped with only one arm, tasked with pulling off daring heists on banks, shops, and various establishments.

    2023ActionStrategyIndieFreeDeck PlayableFree to playSimilar games →
  4. 4
    Kingdom: Classic — Steam game cover

    Kingdom: Classic

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

    Kingdom is a 2D sidescrolling strategy/resource management hybrid with a minimalist feel wrapped in a beautiful, modern pixel art aesthetic.

    2015StrategyIndieSimulationFreeDeck VerifiedFree to playSimilar games →
  5. 5
    War Selection — Steam game cover

    War Selection

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

    War Selection is a compelling RTS game featuring base building, resource extraction and warfare. Evolve from a stone age tribe to a distinct industrial nation with unique game mechanics and battle for supremacy with dozens of players on a unique procedurally generated map.

    2019StrategyIndieMassively MultiplayerFreeDeck PlayableFree to playSimilar games →
  6. 6
    Yet Another Zombie Defense — Steam game cover

    Yet Another Zombie Defense

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

    Darkness is coming. How long can YOU survive? Build your base by day, defend it by night. Play in online or local co-op. Stay alive as long as you can.

    2014ActionStrategyIndieFreeFree to playSimilar games →
  7. 7
    Card Hunter — Steam game cover

    Card Hunter

    Free-to-play alternative to Circuit Keep — no purchase or trial window. Shares Strategy with Circuit Keep.

    Shuffle your cards and ready your dice - Card Hunter is a fresh new card gaming spin on classic tabletop RPGs. Battle your way through a massive campaign solo or with friends and compete with other players in ranked play and tournaments.

    2015StrategyRPGFree To PlayFreeDeck PlayableFree to playSimilar games →
  8. 8
    War of Dots — Steam game cover

    War of Dots

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

    Easy to learn, hard to master. A simple & free RTS game.

    2026StrategyIndieFree To PlayFreeFree to playSimilar games →