Playing with creative AU concept these days, some of them will get develop.

[Slay The Spire] - Sentry

[Underfell] - Asgore

[Terraria] - Eater of Worlds

[Terraria] - Corrupted Goldfish

Dusttale AU challenge, but the main concept is phantom Papyrus.

Dusttale AU challenge, but SP! Dusttale

[X-Tale] - Muffet

[Terraria] - Devourer

[Terraria] - Eater of Souls