The Game Census
iO cover art

iO

Gamious · 2014-12-05

SteamPlayStation StoreMicrosoft Store

ActionIndieRacing

Modes: Single player

Releases: Dec 05, 2014 (Linux), Dec 05, 2014 (Mac), Dec 05, 2014 (PC (Microsoft Windows)), Feb 14, 2017 (PlayStation 4), Feb 14, 2017 (Xbox One), Feb 14, 2017 (PlayStation Vita)

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!

0
playing now
81%
positive of 235 reviews
Very Positive
steam rating
100,000–200,000
owners (SteamSpy est.)
73/100
critic score (1 outlets, IGDB)
60/100
IGDB user rating (1 ratings)
$4.99
steam price (US)

0 players in-game as of 2026-08-30 06:00 UTC (census sample)

Health check

Quiet
  • · 0 players in-game at the last census sample.
  • · 5 reviews in the last 8 weeks (~1/week).
  • · Review velocity up 0% vs the prior 8 weeks.
  • · Top 56% of 11,000 Action games in the census by review count.
Estimated sales: 5.9k–14k copies

Review-multiple estimate from 235 total reviews — how this is computed.

Current store prices

Microsoft Store$7.99

Deal snapshots via CheapShark, refreshed daily.

All-time low: $0.36 at GameBillet (2025-06-03) · bundled 4×via IsThereAnyDeal

12-month high $7.99 · on sale 28 of 31 observed days · $7.63 above the all-time low (census price snapshots)

Review momentum

PositiveNegative
6620142026Week of 2014-12-01: 3 positiveWeek of 2015-01-01: 5 positiveWeek of 2015-02-01: 5 positiveWeek of 2015-03-01: 2 positiveWeek of 2015-04-01: 6 positiveWeek of 2015-04-01: 2 negativeWeek of 2015-05-01: 1 positiveWeek of 2015-06-01: 2 positiveWeek of 2015-07-01: 6 positiveWeek of 2015-07-01: 4 negativeWeek of 2015-08-01: 1 positiveWeek of 2015-08-01: 2 negativeWeek of 2015-09-01: 2 positiveWeek of 2015-09-01: 1 negativeWeek of 2015-10-01: 1 positiveWeek of 2015-10-01: 1 negativeWeek of 2015-11-01: 1 negativeWeek of 2016-01-01: 1 positiveWeek of 2016-02-01: 4 positiveWeek of 2016-03-01: 1 positiveWeek of 2016-04-01: 2 positiveWeek of 2016-05-01: 3 positiveWeek of 2016-08-01: 2 positiveWeek of 2016-10-01: 1 positiveWeek of 2016-11-01: 2 positiveWeek of 2016-11-01: 1 negativeWeek of 2016-12-01: 1 positiveWeek of 2017-01-01: 1 positiveWeek of 2017-01-01: 1 negativeWeek of 2017-06-01: 1 negativeWeek of 2017-07-01: 1 negativeWeek of 2017-08-01: 1 positiveWeek of 2017-11-01: 2 positiveWeek of 2018-04-01: 1 positiveWeek of 2018-05-01: 2 negativeWeek of 2018-06-01: 1 positiveWeek of 2018-07-01: 1 positiveWeek of 2018-10-01: 1 negativeWeek of 2018-12-01: 1 positiveWeek of 2019-01-01: 2 positiveWeek of 2019-04-01: 2 positiveWeek of 2019-06-01: 3 positiveWeek of 2019-07-01: 1 positiveWeek of 2019-09-01: 1 negativeWeek of 2020-02-01: 2 positiveWeek of 2020-05-01: 1 positiveWeek of 2020-10-01: 1 positiveWeek of 2021-04-01: 1 positiveWeek of 2021-09-01: 1 positiveWeek of 2021-09-01: 1 negativeWeek of 2022-01-01: 1 positiveWeek of 2022-04-01: 1 negativeWeek of 2022-06-01: 1 positiveWeek of 2022-07-01: 1 positiveWeek of 2023-01-01: 1 positiveWeek of 2023-05-01: 1 positiveWeek of 2023-06-01: 1 positiveWeek of 2023-07-01: 2 positiveWeek of 2023-12-01: 2 positiveWeek of 2024-02-01: 2 positiveWeek of 2024-04-01: 1 positiveWeek of 2024-10-01: 1 positiveWeek of 2024-12-01: 1 positiveWeek of 2025-02-01: 1 negativeWeek of 2025-08-01: 1 positiveWeek of 2025-11-01: 1 positiveWeek of 2026-04-01: 1 positive
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

002026-08-11 18:00 — 0 players2026-08-12 09:00 — 0 players2026-08-13 01:00 — 0 players2026-08-13 17:00 — 0 players2026-08-14 09:00 — 0 players2026-08-15 01:00 — 0 players2026-08-15 16:00 — 0 players2026-08-16 08:00 — 0 players2026-08-17 00:00 — 0 players2026-08-17 16:00 — 0 players2026-08-18 08:00 — 0 players2026-08-19 00:00 — 0 players2026-08-19 15:00 — 0 players2026-08-20 07:00 — 0 players2026-08-20 22:00 — 0 players2026-08-21 14:00 — 0 players2026-08-22 06:00 — 0 players2026-08-22 22:00 — 0 players2026-08-23 13:00 — 0 players2026-08-24 05:00 — 0 players2026-08-24 21:00 — 0 players2026-08-25 13:00 — 0 players2026-08-26 05:00 — 0 players2026-08-26 22:00 — 0 players2026-08-27 14:00 — 0 players2026-08-28 06:00 — 0 players2026-08-28 22:00 — 0 players2026-08-29 14:00 — 0 players2026-08-30 06:00 — 0 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$9.99$0.372015-01-012026-08-272015-01-01 — best price $4.892016-01-04 — best price $4.992017-06-12 — best price $4.992017-11-16 — best price $1.592018-02-21 — best price $1.992018-07-02 — best price $7.992018-09-24 — best price $8.982019-01-28 — best price $4.992019-07-11 — best price $7.992019-12-24 — best price $4.992020-02-26 — best price $4.192020-04-25 — best price $6.792020-07-01 — best price $3.922020-08-25 — best price $4.992020-10-21 — best price $4.992020-12-05 — best price $4.992021-01-25 — best price $4.142021-03-15 — best price $4.992021-05-01 — best price $4.992021-06-25 — best price $2.722021-08-28 — best price $7.992021-11-28 — best price $4.142022-01-28 — best price $3.922022-07-27 — best price $3.892023-01-05 — best price $1.492023-06-16 — best price $7.992023-09-05 — best price $3.992023-12-18 — best price $0.792024-02-29 — best price $3.892024-06-13 — best price $0.802024-08-20 — best price $3.922024-11-25 — best price $3.992025-03-17 — best price $0.372025-07-10 — best price $4.992025-10-13 — best price $0.382026-08-27 — best price $7.99
Lowest recorded price across tracked stores, per day (census snapshots).

Completion

39
achievements tracked
52.4%
earned "Lets get this party started"
4.9%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsmacOSLinuxFull controller supportSingle-playerSteam AchievementsFull controller supportSteam Trading CardsSteam CloudStatsSteam LeaderboardsRemote Play on TVFamily Sharing

8 supported languages: English, French, Italian, German, Spanish - Spain, Dutch, Polish, Portuguese - Portugal

Player tags

2DIndieActionPuzzleRacingPhysicsPlatformerPuzzle-Platformer

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

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Similarity via IGDB.

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