Single-player games like 31st prototype
Below are 9 single-player Steam games similar to 31st prototype, 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 31st prototype page.
Ranked picks
- 1

Ray of Life
Single-player alternative to 31st prototype — playable solo, no multiplayer required. Shares Adventure with 31st prototype.
Грустная и поучительная история о раннем детстве, его мечтах и страхах, посвящённая тем, кто рос в «нулевые», познал всю прелесть постсоветских дворов и не мог заснуть без любимой игрушки.
- 2

SpaceKraft!
Single-player alternative to 31st prototype — playable solo, no multiplayer required. Shares Adventure with 31st prototype.
Gather crystals, repair/run crafting facilities, upgrade your spaceship, build machines, explore the open world, find your way back to mother earth.
- 3

Machinarium
Single-player alternative to 31st prototype — playable solo, no multiplayer required. Shares Adventure with 31st prototype.
Machinarium is the award-winning independent adventure game developed by the makers of Samorost series, Botanicula and CHUCHEL. Help Josef the robot save his girlfriend Berta kidnapped by the Black Cap Brotherhood gang!
- 4

Firework
Single-player alternative to 31st prototype — playable solo, no multiplayer required.
An accidental fire at a funeral forces the police to re-investigate a closed case of massacre. Lin Lixun participates the re-investigation by chances. As the investigation goes deeper, the past of the victims gradually emerges. However, the case becomes more bewildering.
- 5

Cat carried Butterfly
Single-player alternative to 31st prototype — playable solo, no multiplayer required.
In Republican-era Shanghai, Lu Ping returns to the forgotten Luchang Apartment after receiving a letter from her orphanage headmistress. As lost memories resurface, she uncovers buried secrets, her past, and the eerie truth behind the bond between humans and yaoguai.
- 6

The Great Ace Attorney Chronicles
Single-player alternative to 31st prototype — playable solo, no multiplayer required. Shares Adventure with 31st prototype.
Immerse yourself in a dramatic yet charming and witty world of evidence-gathering, deduction and courtroom battles with this double-pack of the adventures of rookie lawyer Ryunosuke.
- 7

Life of Delta
Single-player alternative to 31st prototype — playable solo, no multiplayer required. Shares Adventure with 31st prototype.
Embark on a journey through a vast post-apocalyptic environment, full of interesting characters and engaging puzzle games in this sci-fi point-and-click adventure game.
- 8

LOST SPHEAR
Single-player alternative to 31st prototype — playable solo, no multiplayer required. Shares Adventure with 31st prototype.
A young man, who suffered a phenomenon that he had never seen, faces an ominous power that threatens the fabric of reality. Awaken the power of Memory to restore what was lost!
- 9

Railway End
Single-player alternative to 31st prototype — playable solo, no multiplayer required. Shares Adventure with 31st prototype.
This is a spot-the-difference game with a railway theme. By comparing photos, find the anomalies in the scene to guide the protagonist to the end of the railway. There is no text in the game.