Primus Underfell - An Undertale Fangame by Primus Official - Game Jolt

Primus!Underfell sans by TODY-BOX on DeviantArt

Did anyone knew about this easter egg? My friend found this. We've done some researches but couldn't find anything so we are asking for reddit's help : r/Undertale

🌸up^'s tumblr 🌸

Stream [UndertaleAU] Swapfell - Flowey Incorporated by Jason Sixty Four {MOVED}

TC!Underfell - Pacifist and Genocide, UNDERTALE Fangame

Primus Underfell - An Undertale Fangame by Primus Official - Game Jolt

Primus UnderFell Sans battle sprite by GeorgTime on DeviantArt

Primus Underfell - An Undertale Fangame by Primus Official - Game Jolt

Undertale Purple, Undertale AU Wiki

Best Undertale Games - Game Jolt

Undertale Rejuvenation, UNDERTALE Fangame

Meta-Kaz — underfellfangame: Game Jolt ▻

Still Going - Primus Underfell - An Undertale Fangame by Primus Official