Single-player games like oiia
Below are 8 single-player Steam games similar to oiia, 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 oiia page.
Ranked picks
- 1

Overcooked! 2
Single-player alternative to oiia — playable solo, no multiplayer required. Shares Indie and Casual with oiia.
Overcooked returns with a brand-new helping of chaotic cooking action! Journey back to the Onion Kingdom and assemble your team of chefs in classic couch co-op or online play for up to four players. Hold onto your aprons… it’s time to save the world again!
- 2

BattleBlock Theater®
Single-player alternative to oiia — playable solo, no multiplayer required. Shares Indie and Casual with oiia.
Welcome to BattleBlock Theater! You’ve got no where to go but up...on stage. Play single player or co-op to free your friends and save Hatty Hattington! Jump, solve and battle your way through a mysterious theater inhabited by highly technological felines.
- 3

ToeJam & Earl: Back in the Groove!
Single-player alternative to oiia — playable solo, no multiplayer required. Shares Indie and Casual with oiia.
ToeJam & Earl: Back in the Groove! is a mash-up of the very best features of the classic console games with a ton of fresh improvements! Explore Earth as funky aliens from planet Funkotron trying to find your missing ship pieces to get back home in this casual co-op roguelike.
- 4

Pit People®
Single-player alternative to oiia — playable solo, no multiplayer required. Shares Indie with oiia.
In this fast-paced, turn-based, co-op adventure you'll quest and explore, find awesome loot, customize your fighters, and recruit strange species! Come master your destiny in this strategic game of positioning.
- 5

Totally Reliable Delivery Service
Single-player alternative to oiia — playable solo, no multiplayer required. Shares Indie with oiia.
Delivery Attempted. That's the Totally Reliable Delivery Service guarantee! T.R.D.S. is a ragdoll physics simulation about terrible package delivery couriers. Work together using odd machinery, useful gadgets, and the wonders of physics to reliably deliver packages to their destination.
- 6

Unrailed!
Single-player alternative to oiia — playable solo, no multiplayer required. Shares Indie and Casual with oiia.
Unrailed! is a co-op multiplayer game where you have to work together with your friends to build a train track across endless procedurally generated worlds. Master random encounters with its inhabitants, upgrade your train and keep it from derailing!
- 7

Pikuniku
Single-player alternative to oiia — playable solo, no multiplayer required. Shares Indie and Casual with oiia.
Pikuniku is an absurdly wonderful puzzle-exploration game that takes place in a strange but playful world where not everything is as happy as it seems. Help peculiar characters overcome struggles, uncover a deep state conspiracy, and start a little revolution in this delightful dystopian adventure!
- 8

The Jackbox Party Pack 6
Single-player alternative to oiia — playable solo, no multiplayer required. Shares Indie and Casual with oiia.
It’s the wildest Party Pack yet, with the absurd deathmatch Trivia Murder Party 2, the weird word circus Dictionarium, the hidden identity game Push The Button, the comedy contest Joke Boat and the offbeat personality test Role Models.