Free games like Kepler Protocol
Below are 8 free-to-play Steam games similar to Kepler 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 Kepler Protocol page.
Ranked picks
- 1
Ultimate Custom Night
Free-to-play alternative to Kepler Protocol — no purchase or trial window.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 2
Grimm's Hollow
Free-to-play alternative to Kepler Protocol — no purchase or trial window.
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.
- 3
Steam Engine Simulator
Free-to-play alternative to Kepler Protocol — no purchase or trial window. Shares Simulation with Kepler Protocol.
The Steam Engine Simulator shown on AngeTheGreat's YouTube channel.
- 4
Magic Archery
Free-to-play alternative to Kepler Protocol — no purchase or trial window. Shares Simulation with Kepler Protocol.
Train a commoner to become the greatest archer in this short incremental game! Increase your stats, gather wealth from quests, buy upgrades, and infuse your arrows with magic.
- 5
The Lab
Free-to-play alternative to Kepler 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!
- 6
Z.A.T.O. // I Love the World and Everything In It
Free-to-play alternative to Kepler Protocol — no purchase or trial window.
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
Landfall Archives
Free-to-play alternative to Kepler Protocol — no purchase or trial window. Shares Strategy with Kepler 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
Moonring
Free-to-play alternative to Kepler Protocol — no purchase or trial window.
A dark-fantasy, turn-based, retro-fusion of classic turn-based RPGs and roguelikes, all presented with a unique neon aesthetic.