Single-player games like Space
Below are 10 single-player Steam games similar to Space, 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 Space page.
Ranked picks
- 1

Dear Diary
Single-player alternative to Space — playable solo, no multiplayer required. Shares Casual with Space.
Dear Diary is a visual novel exclusively for adults! This story is about a guy who liked to pick mushrooms in the forest. On one of the most ordinary days, he met a girl. This girl changed his life once and for all!
- 2

Slave Of Lust
Single-player alternative to Space — playable solo, no multiplayer required. Shares Casual with Space.
Slave Of Lust is a visual novel exclusively for adults! This story tells the story of two university students who came to help a teacher. But they are locked in the same room. At this point, instincts kick in and the students get closer...
- 3

Best Friend
Single-player alternative to Space — playable solo, no multiplayer required. Shares Casual with Space.
Best Friend is a visual novel exclusively for adults! This game will immerse you in the story of a girl who moved in with her friend in New York. She lives side by side with her until she finds out that she is a lesbian. The game is filled with sex scenes, humor and romance.
- 4

NEKOPARA Vol. 1
Single-player alternative to Space — playable solo, no multiplayer required. Shares Indie and Casual with Space.
What's NEKOPARA? Why, it's a cat paradise! Kashou Minaduki, the son of a long line of Japanese confection makers moved out to open his own shop "La Soleil" as a patisserie.
- 5

Projekt: Passion - Season 1
Single-player alternative to Space — playable solo, no multiplayer required. Shares Indie and Casual with Space.
A futuristic adult visual novel filled with sex, comedy, drama, violence, and more sex. Go on a fun-filled space adventure and develop relationships with a diverse cast of characters with their own personalities and motivations.
- 6

My New Memories
Single-player alternative to Space — playable solo, no multiplayer required. Shares Indie and Casual with Space.
Memories...One of the most important things in our lives. But what happens if you forget who you are? If you don't remember anything? Then you can only hope that the people that do know who you are help you out...This is your journey...On your way to finding new memories...
- 7

B.E.S.T
Single-player alternative to Space — playable solo, no multiplayer required. Shares Indie and Casual with Space.
B.E.S.T is an adult visual novel where romance, competition, and betrayal intertwine. 100 participants. $500,000 at stake: who will you trust? Make your choices, build your relationships, seduce or betray… and become the last one standing.
- 8

Knockout Master
Single-player alternative to Space — playable solo, no multiplayer required. Shares Indie with Space.
Knockout Master is a choice-driven adult Visual Novel that puts you in the role of a boxer, whose dream is to become the world heavyweight champion. The game is packed with sex, romance, drama, and a rich story.
- 9

Hot Mom
Single-player alternative to Space — playable solo, no multiplayer required. Shares Casual with Space.
Hot Mom is a visual novel exclusively for adults! This game will immerse you headlong into the story of a guy who goes to college and needs a new apartment. He moves in with his mom's girlfriend, who turns out to be very, very sexy.
- 10

Love Formula
Single-player alternative to Space — playable solo, no multiplayer required. Shares Casual with Space.
Love Formula is a visual novel exclusively for adults! This game will immerse you in the story of two college students who are working on a chemistry project. At some point, one of them accidentally creates an aphrodisiac... The game is filled with sex scenes, humor and romance.