OU — cheap CD keys, compare prices
Is it worth buying?
- Reviews are excellent. (Steam 91%)
- The price is at or near its all-time low — a good time to buy.
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
OU is an adventure game set in a strange, ever-shifting realm called U-chronia, comparable to a novel whose leaves have been shuffled out of sequence. Players step into the role of a character named OU and move through an experience whose true nature stays hidden. room6 and G-MODE worked on development, while G-MODE and yokaze handled publishing in 2023.
Best price today
€9.75
all-time low: official €9.75 · keyshop €14.44 near low
The cheapest OU key right now costs €9.75 at Steam — the best of 4 compared offers. The lowest price we have recorded for this game: €9.75.
The average low over the past 4 months was €10.92.
Prices as of
Steam best price Official store
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
OU prices by store 4
| Store | Type | Price |
|---|---|---|
| Steam | Official store | €9.75 |
| Kinguin | Marketplace | €14.44 |
| K4G | Marketplace | €18.41 |
| Gamivo | Marketplace | €21.53 |
Lowest — official stores
€9.75
Jul 2026
Lowest — keyshops
€14.44
Aug 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €9.75 | €14.44 |
| Sept 2026 | €19.50 | €14.44 |
| Aug 2026 | €9.75 | €14.44 |
| Jul 2026 | €9.75 | €15.00 |
Lowest in-stock price per month from our price history; the current month is the low so far.
How to activate your key
- Steam key — open the Steam client → Games → Activate a Product on Steam → enter the key. Stores with this activation: Steam, Kinguin, K4G, Gamivo
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All-time low so far: €9.75
System requirements
| Minimum | |
|---|---|
| OS | Windows 10 |
| Processor | Intel Core i3-2125 |
| Memory | 4 GB RAM |
| Graphics | NVIDIA GeForce GTX 660 |
| Storage | 5 GB available space |
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About this game — FAQ
Can OU be played single-player?
Yes, OU is a single-player game.
What languages does OU support?
OU is available in: English, Japanese, French, Italian, German, Spanish - Latin America, Portuguese - Brazil, Simplified Chinese.
Does OU use Steam Cloud saves?
Yes, OU uses Steam Cloud, so your saves sync across devices.
FAQ
Where is the cheapest place to buy a OU key?
The cheapest OU key is currently sold by Steam for €9.75. That is the best of 4 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €9.75.
How much does OU cost?
OU currently costs from €9.75 — the cheapest offer across the stores we track.
Is Steam an official store or a keyshop?
Steam is an official store — keys come directly from the publisher or an authorized distributor.
Are keys from these stores legal?
Buying is legal — keys come from the grey market, so a small deactivation risk exists. So before paying, check the seller's buyer protection.
Which key region should I pick?
Global activates everywhere. Regional keys (Europe, North America, RU-CIS) only work on accounts from that region — use the Region filter to match your account.
What is an activation platform?
The service where the key activates — Steam, GOG, Epic or the publisher's platform. A key for one platform won't work on another, hence the separate filter.
What's the difference between editions?
Standard is the base game; Deluxe usually adds an expansion or bonus content. The edition filter shows exactly that variant, with no mixed prices.