Single-player games like Crimsooon Sun
Below are 9 single-player Steam games similar to Crimsooon Sun, 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 Crimsooon Sun page.
Ranked picks
- 1

Kamiya Detective Agency: High School Girl Vanished in The Summer
Single-player alternative to Crimsooon Sun — playable solo, no multiplayer required. Shares Adventure with Crimsooon Sun.
A mystery set in Fukuoka, Japan. Former cop Kengo Kamiya and assistant Hikaru tackle a high school girl's disappearance. A "Photoreal Novel" fully utilizing actual photos and AI. Enjoy snappy banter and unexpected twists in this simple, choice-driven mystery visual novel.
- 2

Escape from Norwood
Single-player alternative to Crimsooon Sun — playable solo, no multiplayer required. Shares Adventure with Crimsooon Sun.
Explore a city that lives without your input in this illustrated text adventure. Observe the lives of its inhabitants behind the veil of your invisibility magic. Find items and combine them to solve intricate puzzles. Set your own pace as you control time and move freely in an open fantasy world.
- 3

Findport: Before the Silence
Single-player alternative to Crimsooon Sun — playable solo, no multiplayer required. Shares Adventure with Crimsooon Sun.
A cyberpunk detective visual novel where you investigate a hidden signal beneath the city, dive into a digital underworld, and make no-win decisions the game remembers all the way to one of four endings.
- 4

You Weren't Invited
Single-player alternative to Crimsooon Sun — playable solo, no multiplayer required. Shares Casual with Crimsooon Sun.
Investigate a murder. Romance five woman. But trust carefully: one of them is the killer.
- 5

The Last Poem
Single-player alternative to Crimsooon Sun — playable solo, no multiplayer required. Shares Adventure and Casual with Crimsooon Sun.
1999年,千年世纪之交……再一次,并非恋爱的邂逅。 由原班人马带来的《泡沫冬景》正统续作,再次向视觉小说表现力的极限发起挑战。
- 6

Liar Trick -Psychological Crime Mystery-
Single-player alternative to Crimsooon Sun — playable solo, no multiplayer required. Shares Adventure and Casual with Crimsooon Sun.
Are all your expressions "real"? The content of a person's words can be both truthful or false. In this new psychological crime mystery game you will unveil "lies" through emotions! You can play Visual Novel Stories, Facial Expression Analysis Mode, Liar mode, and Deduction Mode.
- 7

Sarawak
Single-player alternative to Crimsooon Sun — playable solo, no multiplayer required. Shares Adventure with Crimsooon Sun.
A short literary mystery game set in Oxford and Borneo
- 8

Kindaichi Mystery Series: The Honjin Murders
Single-player alternative to Crimsooon Sun — playable solo, no multiplayer required. Shares Adventure and Casual with Crimsooon Sun.
Famous detective Kosuke Kindaichi's first case, the Honjin Murder Mystery. Honjin descendant Kenzo Ichiyanagi and his new wife Katsuko Kubo lay dead in a bed of blood on the night of their wedding. Kosuke Kindaichi searches for the truth about this locked room murder mystery. However...
- 9

Cold Bed on Route
Single-player alternative to Crimsooon Sun — playable solo, no multiplayer required. Shares Adventure with Crimsooon Sun.
"Cold Bed on Route" is an equation-like adventure game. Work with to find and dump unwanted items. Then, let's make up for the excess weight caused by having her on board. And let's prove that the universe is not yet completely cold and frigid. Now, pilot, it's your turn.