Erratum — cheap CD keys, compare prices
About the game
"Erratum" is a single-player puzzle adventure, playable entirely offline, that casts the player as Tilde, an inquisitive young girl caught in the grip of a sinister ancient book. Progress comes from working through turn-based, dungeon-style puzzle rooms and casting spells of light, all in an effort to help Tilde break free and learn what secrets the pages conceal. It was developed and published by Half & Half Studios, released free-to-play in 2026.
Free-to-play
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System requirements
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 7 | Windows 10 |
| Processor | More than a potato | Better than potato |
| Memory | 2 GB RAM | 4 GB RAM |
| Graphics | If it can run Doom | Doom-compatible or better |
| Storage | 1 GB available space | 1 GB available space |
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About this game — FAQ
Can Erratum be played single-player?
Yes, Erratum is a single-player game.
What languages does Erratum support?
Erratum is available in: English.
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.