Free games like Thermonuclear
Below are 8 free-to-play Steam games similar to Thermonuclear, 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 Thermonuclear page.
Ranked picks
- 1
Awaria
Free-to-play alternative to Thermonuclear — no purchase or trial window. Shares Action and Indie with Thermonuclear.
Awaria is a short game about working in haunted maintenance tunnels.
- 2
Star Fetchers
Free-to-play alternative to Thermonuclear — no purchase or trial window. Shares Action and Indie with Thermonuclear.
The introduction to a wild ride with gangsters and deep state conspiracy theories
- 3
Eternal Senia
Free-to-play alternative to Thermonuclear — no purchase or trial window. Shares Action and Indie with Thermonuclear.
Thoughts and expectations ARPG
- 4
Disfigure
Free-to-play alternative to Thermonuclear — no purchase or trial window. Shares Action and Indie with Thermonuclear.
Disfigure is a grim-dark action rogue-like where you battle relentless hordes of monsters lurking in the shadows. Unlock powerful weapons, craft god-like builds with hundreds of upgrades, slay colossal bosses, and push your limits in intense 20–30 minute survival runs!
- 5
Paper Lily - Chapter 1
Free-to-play alternative to Thermonuclear — no purchase or trial window. Shares Indie with Thermonuclear.
Paper Lily is an RPG horror game in which you can solve puzzles in different ways. Explore a hidden world, meet strange characters, and guide Lacie as she attempts to find answers about her unusual condition.
- 6
Z.A.T.O. // I Love the World and Everything In It
Free-to-play alternative to Thermonuclear — no purchase or trial window. Shares Indie with Thermonuclear.
USSR, 1986. A girl goes missing in the closed city of Vorkuta-5, yet not a soul seems to be concerned. Uncover the mystery behind her disappearance and transmit your signal to the universe.
- 7
Project Kat - Paper Lily Prologue
Free-to-play alternative to Thermonuclear — no purchase or trial window. Shares Indie with Thermonuclear.
Project Kat is a short, unconventional RPG horror game in which there is always another way. Solve puzzles, make friends (or not), and guide Kat as she attempts to uncover the mystery behind a strange golden letter.
- 8
Die in the Dungeon: Origins
Free-to-play alternative to Thermonuclear — no purchase or trial window. Shares Strategy and Indie with Thermonuclear.
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!