IMHO.

Free games like Proton & Electron

Below are 9 free-to-play Steam games similar to Proton & Electron, 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 Proton & Electron page.

Ranked picks

  1. 1
    Life is Strange - Episode 1 — Steam game cover

    Life is Strange - Episode 1

    Free-to-play alternative to Proton & Electron — no purchase or trial window. Shares Action and Adventure with Proton & Electron.

    Episode 1 now FREE! Life is Strange is an award-winning and critically acclaimed episodic adventure game that allows the player to rewind time and affect the past, present and future.

    2015ActionAdventureFreeDeck PlayableFree to playSimilar games →
  2. 2
    Helltaker — Steam game cover

    Helltaker

    Free-to-play alternative to Proton & Electron — no purchase or trial window. Shares Indie and Adventure with Proton & Electron.

    Helltaker is a short game about sharply dressed demon girls.

    2020IndieAdventureFree To PlayFreeDeck PlayableFree to playSimilar games →
  3. 3
    Bongo Cat — Steam game cover

    Bongo Cat

    Free-to-play alternative to Proton & Electron — no purchase or trial window. Shares Indie with Proton & Electron.

    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 →
  4. 4
    ENA: Dream BBQ — Steam game cover

    ENA: Dream BBQ

    Free-to-play alternative to Proton & Electron — no purchase or trial window. Shares Indie and Adventure with Proton & Electron.

    Experience surreal environments and inexplicable characters as ENA in a new wild world.

    2025IndieAdventureFreeDeck VerifiedFree to playSimilar games →
  5. 5
    Indigo Park: Chapter 1 — Steam game cover

    Indigo Park: Chapter 1

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

    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 →
  6. 6
    The Looker — Steam game cover

    The Looker

    Free-to-play alternative to Proton & Electron — no purchase or trial window. Shares Indie with Proton & Electron.

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

    2022IndieFreeDeck PlayableFree to playSimilar games →
  7. 7
    Travellin Cats in Paris — Steam game cover

    Travellin Cats in Paris

    Free-to-play alternative to Proton & Electron — no purchase or trial window. Shares Indie and Casual with Proton & Electron.

    Find 100 cats hidden in Paris, France in this cute hand-drawn hidden object game by Travellin Cats - the original viral hidden cat game creator!

    2023IndieFree To PlayCasualFreeDeck VerifiedFree to playSimilar games →
  8. 8
    Grimm's Hollow — Steam game cover

    Grimm's Hollow

    Free-to-play alternative to Proton & Electron — no purchase or trial window. Shares Indie and Adventure with Proton & Electron.

    A spooky, freeware RPG where you search the afterlife for your brother. Reap ghosts with your scythe, explore haunted caves, and eat ghostly treats on your journey through death.

    2019IndieAdventureRPGFreeDeck PlayableFree to playSimilar games →
  9. 9
    Linebound — Steam game cover

    Linebound

    Free-to-play alternative to Proton & Electron — no purchase or trial window. Shares Indie and Adventure with Proton & Electron.

    One player navigates. One player creates. Linebound is a 2D asymmetric co-op puzzle platformer where one player navigates the world while the other draws platforms in real time. Progress is only possible through communication.

    2026IndieAdventureFree To PlayFreeFree to playSimilar games →