IMHO.

Games like Radioactivity

If Radioactivity is your kind of game, the closest matches are Echoes Afterfall, Backrooms: The Others and Backrooms: The Next Level — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About Radioactivity: Radioactivity is a co-op survival horror. You are a Liquidator! Together or alone, help your state clean up post-apocalyptic radioactive wilderness. Plan each deployment, fight radiation spread and the creatures that it produces. Together, make WEA flourish once more!

2026ActionIndieAdventureEarly AccessWindowsby Synthetic Mind Corp.
Radioactivity — Steam game cover

Players who liked Radioactivity also play

Steam players who put hours into Radioactivity also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. Echoes Afterfall

    WHY THIS

    Top pick for Radioactivity fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Radioactivity.

    Team up in a chilling co-op experience, delving into procedurally generated backroom style buildings. Survive together or succumb into the Echoes.

    2024ActionAdventureEarly Access7.99 USDSteam ↗
  2. Backrooms: The Others

    WHY THIS

    Second-strongest match for Radioactivity fans by collaborative filtering across millions of Steam libraries. Shares Indie and Adventure with Radioactivity.

    Backrooms: The Others is a cooperative horror game for up to 4 players where you will be forced to explore these unknown nooks and crannies, trying to survive in this complex world where death can be waiting for you at every turn!

    2025IndieAdventureSimulation2.99 USDSteam ↗
  3. Backrooms: The Next Level

    WHY THIS

    Third-strongest match for Radioactivity fans by collaborative filtering across millions of Steam libraries. Shares Indie and Adventure with Radioactivity.

    Backrooms: The Next Level is a Co-op horror game up to 4 players, where you and your friends will explore the game, try to pass the game level using your mind, wit, remembering the places where you were

    2025IndieAdventureSimulation1.99 USDSteam ↗
  4. PILGRIM

    WHY THIS

    Ranked #4 for Radioactivity fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Radioactivity.

    Pilgrim is a medieval-based, co-op horror, adventure. Can you and your friends make it to the end of The Road?

    2024ActionIndieAdventure7.99 USDDeck PlayableSteam ↗
  5. The Refuge

    WHY THIS

    Ranked #5 for Radioactivity fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Radioactivity.

    Serve the A.R.C organization. Infiltrate infested zones, complete contracts, and extract with your resources. Upgrade your facilities and complete quests to unlock new services. An intense PvE extraction where the difficulty increases with your ambitions.

    ActionIndieAdventureSteam ↗
  6. MISERY

    WHY THIS

    Ranked #6 for Radioactivity fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Radioactivity.

    MISERY is a 1–5 player co-op survival game set in a nuclear disaster zone. Here, every day is a struggle: search radioactive ruins for resources, build your bunker, craft weapons, and explore a weird, procedurally-generated world with your friends. Beware of anomalies, monsters, and armed bandits.

    2025ActionIndieAdventure12.99 USDDeck VerifiedSteam ↗
  7. Junk Survivor

    WHY THIS

    Ranked #7 for Radioactivity fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Radioactivity.

    Junk Survivor is a zombie post-apocalypse game where you loot, craft, build and farm in a struggle to survive. With a vast map to explore, a robust skillset to unlock this customizable sandbox awaits the adventurer. How long before you die!

    2023ActionIndieAdventure16.99 USDDeck PlayableSteam ↗
  8. Backrooms Lost Runners

    WHY THIS

    Ranked #8 for Radioactivity fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with Radioactivity.

    Backrooms Lost Runners is a co-op survival horror with team play, voice-reactive AI, and immersive puzzles. This isn’t a “walking simulator”: explore liminal spaces, outsmart entities, and remember—even a whisper can give you away.

    2026ActionIndieAdventure12.59 USDSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Life is Strange - Episode 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Adventure with Radioactivity.

    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 PlayableSteam ↗
  2. Helltaker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Adventure with Radioactivity.

    Helltaker is a short game about sharply dressed demon girls.

    2020IndieAdventureFree To PlayFreeDeck PlayableSteam ↗
  3. Ultimate Custom Night

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Radioactivity.

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

    2018ActionIndieFree To PlayFreeSteam ↗
  4. Bongo Cat

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Radioactivity.

    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 PlayableSteam ↗
  5. ENA: Dream BBQ

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Adventure with Radioactivity.

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

    2025IndieAdventureFreeDeck VerifiedSteam ↗
  6. The Murder of Sonic the Hedgehog

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Radioactivity.

    Sonic the Hedgehog...was murdered!? Get to the bottom of the mystery in this brand-new adventure!

    2023IndieSimulationFree To PlayFreeDeck PlayableSteam ↗
  7. Indigo Park: Chapter 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Radioactivity.

    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 PlayableSteam ↗
  8. STRAFTAT

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Radioactivity.

    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 PlayableSteam ↗

Frequently asked about Radioactivity

Does Radioactivity have multiplayer or co-op?
Yes — Radioactivity supports multi-player play according to its Steam store listing (Multi-player, Online Co-op, LAN Co-op).
What games are most similar to Radioactivity?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Radioactivity are Echoes Afterfall, Backrooms: The Others, Backrooms: The Next Level.
Who developed Radioactivity?
Radioactivity was developed by Synthetic Mind Corp..

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Radioactivity.

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16 Games Like Radioactivity — Ranked for 2026 · imho.run