Margin of Error

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

Princess Elyra is bound to Tinta, 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.

Bosses with their own rules:

Each region's general changes how numbers work. Learn the twist, then beat it.

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