Free games like Contagion Protocol
Below are 9 free-to-play Steam games similar to Contagion 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 Contagion Protocol page.
Ranked picks
- 1
Ultimate Custom Night
Free-to-play alternative to Contagion Protocol — no purchase or trial window. Shares Action and Indie with Contagion Protocol.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 2
Indigo Park: Chapter 1
Free-to-play alternative to Contagion Protocol — no purchase or trial window. Shares Action and Indie with Contagion 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
STRAFTAT
Free-to-play alternative to Contagion Protocol — no purchase or trial window. Shares Action with Contagion Protocol.
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.
- 4
Awaria
Free-to-play alternative to Contagion Protocol — no purchase or trial window. Shares Action and Indie with Contagion Protocol.
Awaria is a short game about working in haunted maintenance tunnels.
- 5
Grimm's Hollow
Free-to-play alternative to Contagion Protocol — no purchase or trial window. Shares Indie and RPG with Contagion Protocol.
A spooky, freeware RPG where you search the afterlife for your brother. Reap ghosts with your scythe, explore haunted caves, and eat ghostly treats on your journey through death.
- 6
The Expendabros
Free-to-play alternative to Contagion Protocol — no purchase or trial window. Shares Action and Indie with Contagion Protocol.
The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.
- 7
Iron Snout
Free-to-play alternative to Contagion Protocol — no purchase or trial window. Shares Action and Indie with Contagion 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.
- 8
![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 Contagion Protocol — no purchase or trial window. Shares Action and Indie with Contagion Protocol.
A young girl learns a song. An exclusive side-story set in the world of D-CELL GAMES' upcoming rhythm-adventure.
- 9
FatalZone: Outbreak
Free-to-play alternative to Contagion Protocol — no purchase or trial window. Shares Action and Indie with Contagion Protocol.
Outbreak is the demo version of FatalZone, a bullet heaven zombie apocalypse shooter where you'll have to upgrade your base, hone your mercs' skills, and put them to the test to survive.