Omega Flowey Fight Simulator [patched] (2026 Update)

: Includes automatic checkpoints that save your progress after each of the six human SOUL intermissions, plus fewer active projectiles.

// Simplified phase transition logic let phase = 1; let floweyHP = 100; Omega Flowey Fight Simulator

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Why does this matter? In the original Undertale , the Omega Flowey fight is unique. It locks your Mercy button, shatters your interface, saves over your game in real-time, and requires you to survive six distinct "Soul Modes" (Red, Green, Blue, Purple, Yellow, and Cyan) before the true hero (the six human souls) rebels against the flower. : Includes automatic checkpoints that save your progress

Avoid simulators that ask for downloads. The best versions run entirely in your HTML5 browser. In the original Undertale , the Omega Flowey fight is unique

The original fight features checkpoints, but dying repeatedly can disrupt the narrative flow. Simulators allow players to master specific soul segments or practice dodging his screen-wide laser beam without consequence.