iO
iO
Live player count and Steam charts
positive · 235 reviews
24h low 024h high 1
iO is an abstract physics platformer about size and speed. Grow bigger and smaller in order to solve some of the trickiest puzzles. Reach the exit as quickly as possible and grab a gold medal as your reward!
DeveloperGamious
PublisherGamious
ReleasedDec 5, 2014
Runs onWindows, macOS, Linux
Steam hardwareSteam Deck Playable · SteamOS Playable · Steam Machine Playable
Price$4.99
Player history
Jul 15Jul 16Jul 17Jul 18
Each point is the highest number of players online in that day (UTC). Recorded by Steamalytics every hour since July 14, 2026. Zoom in for finer detail.
Monthly player counts
* current month, data so far
| Month | Avg players | Gain | % gain | Peak |
|---|---|---|---|---|
| Jul 2026 * | 0 | — | — | 1 |
* current month, data so far
Recent updates
via Steam
- Oct 17, 2018iO update incoming!
- Oct 8, 2015iO is back. Free update LIVE now.
- Oct 8, 2015iO is back. Free update LIVE now.
- Oct 2, 2015FREE update incoming next week!
- Oct 2, 2015FREE update incoming next week!
- May 7, 2015Steam Cloud Saving + bug fixes live!
Audience
English
47%
Russian
12%
Chinese (Simplified)
12%
Spanish (Spain)
6%
German
5%
Polish
5%
Other
12%
Language mix of 100 Steam reviews spanning 3054 days — a rough proxy for where the player base is.
Achievements
Achievements
39
Median earned by
4.9%
Rarest earned by
2.3%
Every achievement in the game, ordered from most to least earned (#1 is the one the most players have). Height is the share of all players who have it; the dashed line is the median. Global rates from Steam.
