EVEN OR ODD 1 — cheap CD keys, compare prices
About the game
Even or Odd 1 turns the Collatz Conjecture — one of mathematics' greatest unsolved puzzles — into a fast-paced roguelike action game. Players take on the role of Ichi, a brawny, scatterbrained magical girl who hops between lanes and fires charged shots back at incoming numbers. Fermat Freaks co., Ltd both develops and publishes the free-to-play title, due in 2026.
Free-to-play
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System requirements
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 10 64-bit | Windows 10/11 64-bit |
| Processor | Intel Core i3 / AMD Ryzen 3 | Intel Core i5 / AMD Ryzen 5 |
| Memory | 4 GB RAM | 8 GB RAM |
| Graphics | DirectX 12 compatible GPU (1GB VRAM) | DirectX 12 compatible GPU (2GB VRAM) |
| DirectX | Version 12 | Version 12 |
| Storage | 6 GB available space | 6 GB available space |
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About this game — FAQ
Can EVEN OR ODD 1 be played single-player?
Yes, EVEN OR ODD 1 is a single-player game.
What languages does EVEN OR ODD 1 support?
EVEN OR ODD 1 is available in: English, Japanese, Simplified Chinese, Traditional Chinese.
Does EVEN OR ODD 1 use Steam Cloud saves?
Yes, EVEN OR ODD 1 uses Steam Cloud, so your saves sync across devices.
FAQ
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.