Crimson Onslaught

Crimson Onslaught is a free browser auto-battler "bullet heaven". You move; your spells fire on their own.

Pick an element (Fire, Ice, Lightning or Earth) and build your run from its five spells and 14 ranked passives. Every level-up offers three cards, with Reroll, Skip and Ban to shape your build. Grab relics, crack open elites' chests, and survive until 20:00, when the boss arrives.

• 4 elements × 5 spells

• 7 enemy types, 9 elites and a multi-phase boss

• Permanent upgrades between runs

• Saves progress in your browser

Controls: WASD or arrow keys to move, Esc to pause. Best played in fullscreen.

Sprite and menu art is AI-generated; the music is synthesized in code. Built with Phaser 3.