Compare OCO prices across trusted key stores and find the best deal. Developed by SPECTRUM48. Published by SPECTRUM48. Released on 8/11/2021. Available on PC, Mac. Genres: Action, Indie.

One button, thousands of spinning puzzles, and a procedurally generated soundtrack that makes every run feel like your own private ambient set. Meditative until it isn't.

I kept OCO open in a corner of my afternoon for a week, and I still haven't fully figured out whether it's a puzzle game wearing rhythm-game clothes or the other way around. What I can tell you is that the core hook is almost offensively simple: you control a small white square orbiting circular levels, and your only input is a single jump button. That's it. Left-click. Spacebar. One action, repeated across 180 hand-crafted levels spread across several worlds, each world introducing a new tile type that changes how your square behaves. Bounce pads launch you in arcs you have to learn by feel. Speed tiles send you screaming into the next platform too fast to think. Warp blocks teleport you mid-rotation. By the time the later worlds stack all of these together, that single button is doing a lot of heavy lifting. The part that caught me off guard was the sound. Each level starts with almost nothing, a thin beat hanging in the air, and then every action you take feeds back into the loop. Collecting a yellow square adds a layer. Hitting a bounce pad scratches something into the rhythm. By the end of a clean run the whole thing has built itself into a tight little electronic track that's specifically yours, shaped by how you played. SPECTRUM48 was a finalist at the TIGA Games Industry Awards for Best Audio Design, and sitting with headphones on for even ten minutes, that nomination makes complete sense. It's one of those rare cases where the sound design is inseparable from the actual feel of the controls. There are real questions about fit, though, and they're worth being honest about. OCO started life on iOS and Android in 2019, and that origin shows. Levels are short, self-contained, and designed to be picked up and put down between bus stops. Reviewers have noted the game feels more naturally at home on a phone screen, and I don't entirely disagree. On PC it works, and the mouse-driven level editor is genuinely better than the touchscreen version, but the absence of any narrative throughline or emotional stakes means the game relies entirely on the pleasure of tight mechanics and that generative soundtrack to keep you anchored. Some players log ninety hours chasing perfect-solution rankings and leaderboard spots in the Olympus competitive mode. Others bounce off after clearing the first world and never feel the pull to return. It's not a failing of craft; it's a question of whether score-chasing and rhythm feel are enough hooks for you personally. The community content side adds genuine longevity. The explore mode surfaces tens of thousands of player-created levels, and the requirement that creators must be able to beat their own level before publishing keeps the truly impossible stuff out of the pool. Daily challenges and cross-platform cloud saves round out the package. The only soft warning I'd offer is that a small number of community levels lean hard into sadistic difficulty, so if you're new, filter toward curated picks before diving into the raw feed. The PC version's wider aspect ratio also gives you a slightly cleaner view of the circular geometry, which matters more than it sounds when you're reading bounce-pad trajectories mid-rotation. Kai, Scout Team

OCO

OCO

Aug 11, 2021SPECTRUM48
GamerScout Says

One button, thousands of spinning puzzles, and a procedurally generated soundtrack that makes every run feel like your own private ambient set. Meditative until it isn't.

PCMac
Best Price Available
€3.86
at Kinguin
Lowest tracked: €3.86
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GamerScout Verdict

Best for rhythm and puzzle fans who want a meditative score-chase loop and don't need a story to stay engaged.

Compare Prices(3 stores)

KinguinBest price
StandardGlobalSteam KeyKey
€3.86
Priced in EUR by the store
Buy
StandardEurope (EU)Steam KeyKey
€3.99
Priced in EUR by the store
Buy
StandardEurope (EU)Steam KeyKey
€4.52
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€4.87
Priced in EUR by the store
Buy

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Price History

Lowest tracked
€3.8624 Aug 2026
Current best
€3.86
Lowest since we started tracking
Keyshops
€3.61€3.82€4.03€4.247 Jun30 Jun23 Jul14 Aug6 Sept
7 Jun — 6 Sept
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About OCO

I kept OCO open in a corner of my afternoon for a week, and I still haven't fully figured out whether it's a puzzle game wearing rhythm-game clothes or the other way around. What I can tell you is that the core hook is almost offensively simple: you control a small white square orbiting circular levels, and your only input is a single jump button. That's it. Left-click. Spacebar. One action, repeated across 180 hand-crafted levels spread across several worlds, each world introducing a new tile type that changes how your square behaves. Bounce pads launch you in arcs you have to learn by feel. Speed tiles send you screaming into the next platform too fast to think. Warp blocks teleport you mid-rotation. By the time the later worlds stack all of these together, that single button is doing a lot of heavy lifting. The part that caught me off guard was the sound. Each level starts with almost nothing, a thin beat hanging in the air, and then every action you take feeds back into the loop. Collecting a yellow square adds a layer. Hitting a bounce pad scratches something into the rhythm. By the end of a clean run the whole thing has built itself into a tight little electronic track that's specifically yours, shaped by how you played. SPECTRUM48 was a finalist at the TIGA Games Industry Awards for Best Audio Design, and sitting with headphones on for even ten minutes, that nomination makes complete sense. It's one of those rare cases where the sound design is inseparable from the actual feel of the controls. There are real questions about fit, though, and they're worth being honest about. OCO started life on iOS and Android in 2019, and that origin shows. Levels are short, self-contained, and designed to be picked up and put down between bus stops. Reviewers have noted the game feels more naturally at home on a phone screen, and I don't entirely disagree. On PC it works, and the mouse-driven level editor is genuinely better than the touchscreen version, but the absence of any narrative throughline or emotional stakes means the game relies entirely on the pleasure of tight mechanics and that generative soundtrack to keep you anchored. Some players log ninety hours chasing perfect-solution rankings and leaderboard spots in the Olympus competitive mode. Others bounce off after clearing the first world and never feel the pull to return. It's not a failing of craft; it's a question of whether score-chasing and rhythm feel are enough hooks for you personally. The community content side adds genuine longevity. The explore mode surfaces tens of thousands of player-created levels, and the requirement that creators must be able to beat their own level before publishing keeps the truly impossible stuff out of the pool. Daily challenges and cross-platform cloud saves round out the package. The only soft warning I'd offer is that a small number of community levels lean hard into sadistic difficulty, so if you're new, filter toward curated picks before diving into the raw feed. The PC version's wider aspect ratio also gives you a slightly cleaner view of the circular geometry, which matters more than it sounds when you're reading bounce-pad trajectories mid-rotation.

Kai
Kai · Scout Team

Indie & narrative

Tags

singleplayerachievementscloud-savestier:sub-5Rhythm-PlatformerOne-Button ControlsProcedural SoundtrackCircular LevelsLevel EditorDaily ChallengesScore-ChasingCross-Platform SaveCommunity LevelsOlympus Mode

System Requirements

Minimum

OS
Windows 7 (32-bit)
Memory
4 GB RAM
Storage
200 MB available space
Graphics
512Mb
Processor
Intel i5 1.8Ghz

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Game Info

Developer
SPECTRUM48
Publisher
SPECTRUM48
Release Date
Aug 11, 2021

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Frequently asked questions about OCO

How much does OCO cost?

As of 6 September 2026, the cheapest in-stock offer for OCO is €3.86 at Kinguin, out of 4 live offers we track across verified key stores. Prices change daily — the table on this page is refreshed continuously.

Where can I buy OCO cheapest?

The lowest in-stock price we track for OCO is €3.86 at Kinguin (6 September 2026). We compare 4 live offers from verified key stores — the full table with every store and its trust score is on this page.

What platforms is OCO available on?

OCO is available on PC, Mac.

When was OCO released?

OCO was released on 11 August 2021.

Who developed OCO?

OCO was developed by SPECTRUM48.