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Watch trailer on Steam ↗OFF BY
REDSEN GAMES · Published by REDSEN GAMES · Official site ↗
15 achievements
Last updated 28 Sept 2026
Design the wrong. Combine the errors. Prove what’s possible.
£4.99
Lowest price we've ever recorded
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Price history
Indie, Casual · 2025 · More under £5 games
Prove what’s possible by combining errors and design the wrong in OFF BY. With its unique gameplay mechanics, this 2025 indie casual experience from REDSEN GAMES invites you to explore a world where mistakes are the key to success.
About this game
Welcome to the world of errors!
A light, cute, and relaxing logic puzzle that begins with the simplest formulas.
Complete each formula to reach the target error value and clear the stage.
The game offers 15 levels and 128 handcrafted stages designed to challenge your logic and creativity.
Errors breed more errors, and tiny deviations open new paths.
From these errors, beings known as Eri and Kori are born — and they never forget the rituals of their creation.
Recruit supporters to accelerate your progress toward the target error.
But beware — some number blocks come with their own constraints, adding unique conditions to your play.
Start with small calculations, and watch as they grow into a complex flow of logic and cascading errors!
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: Intel Core i3
- Memory: 8 GB RAM
- Graphics: Intel HD Graphics 4000 / NVIDIA GeForce GTX 660
- DirectX: Version 11
- Storage: 500 MB available space
- Additional Notes: Can run on low-spec PCs.
Recommended
- Requires a 64-bit processor and operating system
- Memory: 8 MB RAM
