Single-player games like Rainbow Billy: The Book of Fears
Below are 8 single-player Steam games similar to Rainbow Billy: The Book of Fears, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Rainbow Billy: The Book of Fears page.
Ranked picks
- 1
Duck Detective: The Secret Salami
Single-player alternative to Rainbow Billy: The Book of Fears — playable solo, no multiplayer required. Shares Indie and Adventure with Rainbow Billy: The Book of Fears.
Solving crime is no walk in the pond. You are a down-on-his-luck detective who also happens to be a duck. Use your powers of de-duck-tion to inspect evidence, fill in the blanks, and bust the case wide open! This is a short but twisty detective case.
- 2
Duck Detective: The Ghost of Glamping
Single-player alternative to Rainbow Billy: The Book of Fears — playable solo, no multiplayer required. Shares Indie and Adventure with Rainbow Billy: The Book of Fears.
You are the one and only Duck Detective, a depressed and recently divorced duck who must quack the case. Inspect evidence, make de-duck-tions, and solve this no-murder mystery!
- 3
Dimhaven - The Lost Source
Single-player alternative to Rainbow Billy: The Book of Fears — playable solo, no multiplayer required. Shares Indie and Adventure with Rainbow Billy: The Book of Fears.
Are you ready for an adventure? Challenges, exploration and puzzles in a narrative driven experience, pick up your camera and test your wits in this first-person mystery by the team behind Quern!
- 4
Kathy Rain: Director's Cut
Single-player alternative to Rainbow Billy: The Book of Fears — playable solo, no multiplayer required. Shares Indie and Adventure with Rainbow Billy: The Book of Fears.
The award-winning point-and-click adventure returns in the Director's Cut with an extended story, additional puzzles, and new areas to explore. Witness the rise of an iconic detective as you uncover a dark and sinister truth hiding behind the calm exterior of a small rural town.
- 5
Frog Detective 1: The Haunted Island
Single-player alternative to Rainbow Billy: The Book of Fears — playable solo, no multiplayer required. Shares Indie and Adventure with Rainbow Billy: The Book of Fears.
You're a detective, and a frog, and it's time to solve a mystery.
- 6
Frog Detective 3: Corruption at Cowboy County
Single-player alternative to Rainbow Billy: The Book of Fears — playable solo, no multiplayer required. Shares Indie and Adventure with Rainbow Billy: The Book of Fears.
You're a detective, and a frog, and it's time to solve a mystery in the wild west.
- 7
Crime O'Clock
Single-player alternative to Rainbow Billy: The Book of Fears — playable solo, no multiplayer required. Shares Indie and Adventure with Rainbow Billy: The Book of Fears.
Crime O'Clock is a hidden objects investigation and time exploration game with a deep storyline. Investigate cases through time and evolving maps by unveiling a multi-eras linked story. Will you be observant enough to solve the mysteries? Crime waits for no man!
- 8
Strange Horticulture
Single-player alternative to Rainbow Billy: The Book of Fears — playable solo, no multiplayer required. Shares Indie and Adventure with Rainbow Billy: The Book of Fears.
Strange Horticulture is an occult puzzle game in which you play as the proprietor of a local plant store. Find and identify new plants, pet your cat, speak to a coven, or join a cult. Use your collection of powerful plants to influence the story and unravel Undermere’s dark mysteries.