Even or Odd 1

Even or Odd 1 is a reflex-based action game in which Ichi, an amnesiac magical girl, confronts the Collatz Conjecture by fighting monsters that fire numbers at her. She must quickly identify each number as even or odd, teleport to the corresponding lane and strike back. Ichi’s reason for fighting and what awaits her at the end of the endless calculation remain mysteries.

Fight with numbers

Enemies unleash barrages of numbers. You move to the upper lane for even numbers and the lower lane for odd ones, then charge and fire the correct magic. Chaining correct answers multiplies your power; reduce an enemy’s number to 1 to finish it with a powerful attack. When a massive number collapses to 1, Ichi’s magic spirals out of control.

Parry enemy attacks

Read the trajectory of incoming attacks and strike at the right moment to parry and counter. When you are cornered, Auto-Parry can help you survive dense bullet barrages.

Return from death

After dying, you return to Heaven and spend collected currency to permanently upgrade your stats. You can also discover and equip over 10 Grimoires, or magic books, each with unique effects.

Track your mastery

The game has 90 achievements across nine categories, including Max Combos, Highest Floor Reached and Max Damage.