Free games like Cepheus Protocol
Below are 8 free-to-play Steam games similar to Cepheus Protocol, 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 Cepheus Protocol page.
Ranked picks
- 1
Ultimate Custom Night
Free-to-play alternative to Cepheus Protocol — no purchase or trial window. Shares Action and Indie with Cepheus Protocol.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 2
Indigo Park: Chapter 1
Free-to-play alternative to Cepheus Protocol — no purchase or trial window. Shares Action and Indie with Cepheus Protocol.
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.
- 3
The Expendabros
Free-to-play alternative to Cepheus Protocol — no purchase or trial window. Shares Action and Indie with Cepheus Protocol.
The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.
- 4
Iron Snout
Free-to-play alternative to Cepheus Protocol — no purchase or trial window. Shares Action and Indie with Cepheus Protocol.
Iron Snout is a fast, colorful and brutal fighting game in which you will be helping a piglet fight for its life against hordes of wolves.
- 5
Star Fetchers
Free-to-play alternative to Cepheus Protocol — no purchase or trial window. Shares Action and Indie with Cepheus Protocol.
The introduction to a wild ride with gangsters and deep state conspiracy theories
- 6
The Lab
Free-to-play alternative to Cepheus Protocol — 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!
- 7
Landfall Archives
Free-to-play alternative to Cepheus Protocol — no purchase or trial window. Shares Action and Strategy with Cepheus Protocol.
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!
- 8
SuchArt: Creative Space
Free-to-play alternative to Cepheus Protocol — no purchase or trial window. Shares Action and Indie with Cepheus Protocol.
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!