Free games like Thief Simulator 3
Below are 8 free-to-play Steam games similar to Thief Simulator 3, 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 Thief Simulator 3 page.
Ranked picks
- 1
Ultimate Custom Night
Free-to-play alternative to Thief Simulator 3 — no purchase or trial window. Shares Action and Indie with Thief Simulator 3.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 2
Bongo Cat
Free-to-play alternative to Thief Simulator 3 — no purchase or trial window. Shares Indie and Simulation with Thief Simulator 3.
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?
- 3
Indigo Park: Chapter 1
Free-to-play alternative to Thief Simulator 3 — no purchase or trial window. Shares Action and Indie with Thief Simulator 3.
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.
- 4
STRAFTAT
Free-to-play alternative to Thief Simulator 3 — no purchase or trial window. Shares Action with Thief Simulator 3.
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.
- 5
Counter-Strike:Global Offensive
Free-to-play alternative to Thief Simulator 3 — no purchase or trial window. Shares Action with Thief Simulator 3.
Counter-Strike:Global Offensive (CS:GO) expands upon the team-based action gameplay that it pioneered when it was launched over 2 decades ago. CS:GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).
- 6
The Expendabros
Free-to-play alternative to Thief Simulator 3 — no purchase or trial window. Shares Action and Indie with Thief Simulator 3.
The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.
- 7
![UNBEATABLE [white label] — Steam game cover](https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/1290490/header.jpg?t=1736770503)
UNBEATABLE [white label]
Free-to-play alternative to Thief Simulator 3 — no purchase or trial window. Shares Action and Indie with Thief Simulator 3.
A young girl learns a song. An exclusive side-story set in the world of D-CELL GAMES' upcoming rhythm-adventure.
- 8
The Lab
Free-to-play alternative to Thief Simulator 3 — 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!