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- ibb & obb
ibb & obb
A puzzle platformer for two where opposite gravity pulls you through the same obstacles from different sides.
Online and shared-screen co-op for 2 players.
- 2 online
- 2 shared-screen
Where to buy
Playing together
- Online co-op2 players
- Local co-op2 playersShared screen
- Not confirmedFriends on different platforms, such as PC and PlayStation, can play together.
- Not confirmedA friend can join or leave while you are already playing, without starting over.
- Not confirmedFriends play free with a Friend's Pass or similar.
- Steam DeckVerifiedValve's own rating
About the game
You and a friend guide two small creatures through a world with gravity on both sides of the ground. Portals let you cross between the two directions. You use the speed from a fall to reach higher ledges, help each other over gaps and find a route that lets both characters move on.
The levels ask you to coordinate jumps and deal with enemies from their vulnerable side. One player can clear a threat while the other collects its reward. You can play together on one device or online. Later puzzles demand careful timing from both of you, so a solved route can still take several attempts. Hidden levels give you more to find after you learn the basic rules.
How it feels
Kind of game
Made for exactly two players. You play set levels or a story from start to end, and every part is built for the pair.
- A big part
- Now and then
- Laughter and chaos
- Tension and danger
- Calm and coziness
- Time to hang out
- Exploring
- Fighting
- Planning ahead
- Sessions
- Campaign to finish
- About
- Gravity worlds
Rated on our own feel scale. 7 sources back these ratings.
Screenshots
From the Steam store page. Open one to see it full size.
If you liked ibb & obb
You will probably enjoy these too. Each one says why.
Together: Moon Escape
Why it scores 84%
What they share
- Kind of game
- Campaign for two
- Core to both
- Working in sync, Puzzles and figuring out
- About
- Gravity worlds
- Notable in both
- Jumping and climbing
- Sessions
- Campaign to finish
- Co-op
- Online and local co-op for 2 players
How Together: Moon Escape differs
- More story than ibb & obb
- Exactly 2 online
- 2 split-screen
- Crossplay
Both are campaigns made for two players. Both need you to talk and act in sync. Both are about worlds with unusual gravity.
But more story than ibb & obb.
Biped
Why it scores 79%
What they share
- Kind of game
- Campaign for two
- Core to both
- Working in sync, Jumping and climbing, Puzzles and figuring out
- Sessions
- Campaign to finish
- Notable in both
- Getting better
- Co-op
- Online and shared-screen local co-op for 2 players
How Biped differs
- More slapstick than ibb & obb
- 2 online
- 2 shared-screen
- Crossplay
Both are campaigns made for two players. Both are full of jumping and climbing together. Both make you work things out together.
But more slapstick than ibb & obb.
BattleBlock Theater
Why it scores 78%
What they share
- Kind of game
- Campaign for two
- Core to both
- Working in sync, Jumping and climbing
- Notable in both
- Puzzles and figuring out, Getting better
- Sessions
- Campaign to finish
- Co-op
- Online and shared-screen local co-op for 2 players
How BattleBlock Theater differs
- More story than ibb & obb
- 2 online
- 2 shared-screen
Both are campaigns made for two players. Both need you to talk and act in sync. Both are full of jumping and climbing together.
But more story than ibb & obb.
All co-op facts
Last checked 24 October 2026. The small numbers link to the page that states each fact.
Co-op
- Fewest players online
- Not confirmed
- Separate-device co-op
- Not confirmed
- Most players on separate devices
- Not confirmed
- Free base co-op
- No
The checked computer full-base edition has a paid base-game access model. Demos, trials, guest passes, platform sharing and temporary grants do not establish ongoing free base co-op.
- 145
- Confirmed free setups
- Does not apply
- Crossplay
- Not confirmed
- Crossplay between
- Not confirmed
- Friends can join mid-game
- Not confirmed
- Only one of you needs to buy it
- Not confirmed
- Voice chat by distance
- Not confirmed
Sources
10 pages
store.steampowered.comStore page, read 24 October 2026
Backs Online co-op, Local co-op, Platforms, Release status, Sessions, Exploring, Laughter and chaos, About, Free base co-op.
- Online co-op: Maker description explicitly supports local and online cooperation.
- Local co-op: Maker description explicitly supports local and online cooperation.
- Platforms: Current system requirements list Windows and SteamOS plus Linux.
- Release status: The base game has an active purchase offer.
- Sessions: A finite set of 15 main levels and eight hidden worlds.
- Exploring: Hidden worlds are found off the main route.
- Laughter and chaos: Funny is a displayed user tag. Controlled puzzles keep this minor.
- About: The stated premise has gravity pulling up and down.
- Free base co-op: The checked computer full-base edition has a paid base-game access model. Demos, trials, guest passes, platform sharing and temporary grants do not establish ongoing free base co-op.
store.steampowered.comStore data, read 24 October 2026
Backs Steam app ID, Platforms.
- Steam app ID: Steam identifies ibb & obb as app 95400.
- Platforms: Current available builds are Windows and Linux.
ibbandobb.comOfficial site, read 24 October 2026
Backs Online co-op, Local co-op, Most players online, Most players on one screen, Working in sync, About.
- Online co-op: The maker describes online matching and Nintendo invitations.
- Local co-op: The maker explicitly describes local co-op and playing on one Switch.
- Most players online: The maker calls it a two-player cooperative game, including online play.
- Most players on one screen: The maker calls it a two-player cooperative game, including one Switch.
- Working in sync: The maker says close cooperation is necessary to succeed.
- About: Opposing gravity is the main stated premise.
nintendo.comStore page, read 24 October 2026
Backs Most players online, Most players on one screen, Platforms, Free base co-op.
- Most players online: Switch table lists online play for two.
- Most players on one screen: Switch table lists single-system play for two. Local wireless is separate.
- Platforms: Nintendo sells the Switch edition and explicitly marks this title as supported on Nintendo Switch 2 with consistent game behaviour. Switch 2 play uses backward compatibility.
- Free base co-op: The checked Nintendo full-base edition has a paid base-game access model. Demos, trials, guest passes, platform sharing and temporary grants do not establish ongoing free base co-op.
blog.playstation.comOfficial news, read 24 October 2026
Backs Release date, Kind of game, Free base co-op.
- Release date: Maker launch post dated August 6, 2013 says it launches that day on PSN. Steam arrived later.
- Kind of game: The maker says the design was built around interaction between two players.
- Free base co-op: The checked PlayStation full-base edition has a paid base-game access model. Demos, trials, guest passes, platform sharing and temporary grants do not establish ongoing free base co-op.
blog.playstation.comOfficial news, read 24 October 2026
Backs Genres, Kind of game, Fighting.
- Genres: The maker explicitly calls it a cooperative puzzle platformer.
- Kind of game: The maker says all elements are designed for two, including puzzles and enemy handling.
- Fighting: One player destroys enemies while the other catches rewards.
nintendolife.comPress, read 24 October 2026
Backs Calm and coziness, Puzzles and figuring out, Working in sync, Jumping and climbing, Planning ahead.
- Calm and coziness: Nintendo Life, March 21, 2020, describes relaxing music and pleasant scenery alongside difficult puzzles.
- Puzzles and figuring out: The review explains momentum puzzles and different routes through coloured portals.
- Working in sync: Both players must complete each obstacle before progressing.
- Jumping and climbing: Tricky jumps through opposing gravity planes are the main movement challenge.
- Planning ahead: The pair must stop and assess how both characters can reach the next ledge.
expertreviews.co.ukPress, read 24 October 2026
Backs Tension and danger, Exploring, Getting better, Jumping and climbing, Split or shared screen.
- Tension and danger: Expert Reviews, September 2, 2013, describes instant deaths with generous checkpoints at individual puzzles.
- Exploring: The review describes concealed secret levels.
- Getting better: Later encounters require both players to learn precise timing and movement.
- Jumping and climbing: The review describes momentum jumps, head boosts and gravity bubbles.
- Split or shared screen: Expert Reviews contrasts split-screen play with the central line forming part of one shared landscape.
psu.comPress, read 24 October 2026
Backs Time to hang out.
- Time to hang out: The review stresses direct communication to solve the puzzles, so conversation is mostly about the task.
store.steampowered.comStore data, read 24 October 2026
Backs Steam Deck.
- Steam Deck: Valve rates the game Verified on Steam Deck.