| Feature | Original Undertale (2015) | Omega Flowey Simulator 2021 | | :--- | :--- | :--- | | Difficulty | Narrative (Unwinnable until scripted event) | Mechanical (True survival skill) | | Replayability | Low (One shot per save file) | High (Endless mode included) | | Death Screen | Game Over, then Flowey taunts you. | Instant reset; Flowey mocks your IP address (simulated). | | Soul Abilities | Automatic | Player-controlled trigger | | Platform | PC/Mac/Console | Browser (Desktop & Mobile) |
| Feature | Implementation | |---------|----------------| | Engine | HTML5 Canvas + JavaScript (no Flash) | | Input | Arrow keys (movement), mouse (menu selection) | | Phases | 6 (Friendship pellets, hands, flamethrower, etc.) | | Save Mechanic | 6 colored soul buttons (restore health per phase) | | UI Destruction | Simulated screen cracking, fake “crash” popups | | Audio | Extracted Undertale OST (“Your Best Nightmare,” “Finale”) |
Writing about the Omega Flowey Fight Simulator -2021- requires acknowledging the artistry behind the terror. In a game filled with puns and hugs, Omega Flowey represents a fourth-wall-breaking apocalypse. Omega Flowey Fight Simulator -2021-
Because the simulator was a browser-based HTML5 game, it remains accessible on most archive sites. As of 2025, you can find it on:
Warning: The simulator contains extreme flashing lights. If you have photosensitive epilepsy, do not play Phase 3. Also, be aware that the audio mix is loud—Flowey’s laugh (voiced by a fan impressionist in the 2021 version) is known to clip your speakers. | Feature | Original Undertale (2015) | Omega
Community feedback (from Reddit r/Undertale and GameJolt comments):
In the original game, you are destined to win. The six human souls intervene, offering you mercy and healing. But in the 2021 simulators? The training wheels are off. This is where the community goes to prove their mastery. Players aren’t just surviving; they are attempting "Hitless" runs, dissecting the chaotic patterns of finger-guns, flamethrowers, and the dreaded "friendliness pellets." It transforms a narrative horror encounter into a high-octane bullet-hell masterpiece. Warning: The simulator contains extreme flashing lights
Unlike the original game where the souls rebel automatically, the 2021 simulator often includes a Soul Meter. You must survive for 45 seconds to 2 minutes without the souls helping you. Once the meter fills, you can click the floating human souls (Cyan, Orange, Blue, Purple, Green, Yellow) to trigger their unique abilities—turning the tables on Flowey.
Omega Flowey (a.k.a. Photoshop Flowey) is a transformed boss version of Flowey from the indie RPG Undertale (2015). The Omega Flowey fight simulator—especially fan-made recreations circulated around 2015–2021—attempts to reproduce the boss’s surreal, multimedia battle sequence: rapid-fire bullet-hell patterns, grotesque sprite animations, distorted audio and video effects, and intrusive UI elements that break the game’s usual rules. The 2021 tag likely refers either to a specific fan remake released or updated in that year, or to compilations and emulations that proliferated on websites and social platforms.