Free games like Radioactive
Below are 8 free-to-play Steam games similar to Radioactive, 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 Radioactive page.
Ranked picks
- 1
STRAFTAT
Free-to-play alternative to Radioactive — no purchase or trial window.
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.
- 2
The Lab
Free-to-play alternative to Radioactive — 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!
- 3
Landfall Archives
Free-to-play alternative to Radioactive — no purchase or trial window. Shares Strategy with Radioactive.
Break into the Landfall Archives to steal and play previously unreleased games, demos, interactive slide shows, and even an unreleased version of Totally Accurate Battle Simulator from 2017!
- 4
SuchArt: Creative Space
Free-to-play alternative to Radioactive — no purchase or trial window.
Paint on any surfaces with numerous tools in Creative Space — a free sandbox version of SuchArt: Genius Artist Simulator. Create masterpieces, complete commissions, and decorate your studio in the most advanced artist sim!
- 5
Crime Scene Cleaner: Prologue
Free-to-play alternative to Radioactive — no purchase or trial window.
When there’s a call, you are the man to clean up after your client’s dirty job. Siding with the mafia is a dangerous game, but they pay well, and you need money, right? So take your mop and better remove those bloodstains quickly before the police come.
- 6
Die in the Dungeon: Origins
Free-to-play alternative to Radioactive — no purchase or trial window. Shares Strategy with Radioactive.
Fight your way through a mysterious dungeon in this deck-building, turn-based roguelike game where you don't use cards, but DICE! Deal with enemies by combining dice on your board, boost their effects with magical relics, and discover the story behind Die in the Dungeon!
- 7
Jigsaw Puzzle Dreams
Free-to-play alternative to Radioactive — no purchase or trial window.
Beautiful Multiplayer Jigsaw Puzzle game where you can design the room you play in!
- 8
Tom Clancy's Rainbow Six Siege
Free-to-play alternative to Radioactive — no purchase or trial window.
Rainbow Six® Siege is the reference in tactical team shooters, where elite strategy and execution triumph. Enjoy free access to Quick Match, Unranked, and Dual Front game modes with a selection of operators.