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Margin of Error
Princess Elyra is bound to a cursed grimoire. Lead her party through six monster-filled regions in this deckb-building roguelite RPG, where every attack is a numbers puzzle: play number and operation cards to hit each enemy’s exact target. Miss it, and the monster makes you pay.

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Features
Languages:
Interface Full Audio Subtitles
English ✔ ✔
Indonesian ✔ ✔
Japanese ✔ ✔
Russian ✔ ✔
Simplified Chinese ✔ ✔
This game is not yet available on Steam

Planned Release Date: Q1 2027

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About This Game

Margin of Error is a deck-building roguelite where every battle is a numbers puzzle and every answer counts.

Princess Ely is bound to Grim, a cursed grimoire with a sharp tongue and a long memory. To break the curse she must lead her party across six regions full of monsters and the generals who command them. Each enemy carries a target number. Hit it exactly with your cards and your attack lands. Count your way to victory

Math as magic:

Play number and operation cards to reach the enemy's target. Fight with smart combinations, not grinding.

Party vs. enemies:

Lead a team against groups of foes. Choose who to hit, when to take a risk, and when to play it safe.

Fog-of-war labyrinth:

Explore a hidden node map of fights, shops, forges, events and bosses. No two runs are the same.

Build your deck and your gear: Collect stamps, artifacts and modules. Forge and upgrade gear across rarities, from common to legendary.

Easy to learn and deep to master. Whether you love numbers or fear them, Margin of Error turns quick thinking into your strongest spell.

System Requirements

Windows
macOS
SteamOS + Linux
    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10+ (64-bit)
    • Processor: Intel Core i3-2100 (2.0 GHz) or AMD FX-4100 (2.0 GHz)
    • Memory: 4 GB RAM
    • Graphics: DirectX 10 compatible graphics card with 512 MB VRAM
    • Storage: 500 MB available space
    • Sound Card: DirectX compatible sound card
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10+ (64-bit)
    • Processor: Intel Core i5-4460 (3.2 GHz) or AMD Ryzen 3 1200 (3.1 GHz)
    • Memory: 8 GB RAM
    • Graphics: DirectX 11 compatible graphics card with 1 GB VRAM
    • Storage: 1 GB available space
    • Sound Card: DirectX compatible sound card
    Minimum:
    • OS: macOS 12 Monterey
    • Processor: Apple M1 or Intel Core i5 (both)
    • Memory: 4 GB RAM
    • Graphics: Metal-capable GPU, 1 GB VRAM
    • Storage: 1500 MB available space
    Recommended:
    • OS: macOS 13 Ventura or later
    • Processor: Apple M1 or better / Intel Core i7
    • Memory: 8 GB RAM
    • Graphics: Apple M1 GPU / Radeon Pro 560 or better
    • Storage: 2000 MB available space
* Starting February 15, 2024, the Steam Client will no longer support 32-bit games or macOS 10.14 or lower.
    Minimum:
    • OS: Ubuntu 20.04+ / SteamOS 3
    • Processor: Dual-core 2.0 GHz, x64
    • Memory: 4 GB RAM
    • Graphics: OpenGL 4.5 / Vulkan, 1 GB VRAM (Intel HD 620 or equivalent)
    • Storage: 1500 MB available space
    • Sound Card: Any
    Recommended:
    • OS: Ubuntu 22.04+ / SteamOS 3
    • Processor: Quad-core 2.5 GHz, x64
    • Memory: 8 GB RAM
    • Graphics: Vulkan, 2 GB VRAM (GTX 960 / RX 470 or better)
    • Storage: 2 GB available space
    • Sound Card: Any