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iO is a physics platformer in which you control a ball. By growing or shrinking the ball you can influence its speed and weight. Use these mechanics to gain momentum and make your way through the levels. Toy with the laws of physics, solve the puzzles and reach the exit as quickly as possible. Can you win the gold medal in all levels?
Game modes: Single player
Right now the lowest price for iO we're tracking is $0.81 at Kinguin — 84% below Steam's $4.99. We compare 5 stores and prices refresh every few minutes.
The lowest price we've recorded for iO is $0.45 at Kinguin on August 18, 2026. The current best price is about 80% above that low.
81% of 102 Steam user reviews for iO are positive ("Very Positive").
iO released on December 5, 2014, developed by Gamious and published by Gamious.
iO is available on PlayStation 4, Linux, PC (Microsoft Windows), Mac, PlayStation Vita, Xbox One. It supports single player.
iO last hit a new low of $0.45 on August 18, 2026 at Kinguin. Current best price is $0.81. Prices on this page refresh every few minutes, so check back around seasonal sales for new lows.
The cheapest iO price right now is $0.81 at Kinguin, 84% below the Steam price.
| Store | Discount | Price | Buy link |
|---|---|---|---|
 KinguinBest price | — | $0.81 | Buy iO at Kinguin |
 Gamivo | — | $0.83 | Buy iO at Gamivo |
 Driffle | — | $1.69 | Buy iO at Driffle |
 Instant Gaming | -26% | $4.23 | Buy iO at Instant Gaming |
 Steam | — | $4.99 | Buy iO at Steam |
All-time low: $0.45 at Kinguin on Aug 18, 2026 — the current best price is 80% above it.
Prices in USD, refreshed every few minutes. Switch currency on this page for EUR/GBP/BRL and more.
