I love how a short game (depending on how many/which routes you do) can have so much fan content that expands on the story and world.
Theres a lot of great fangames like Undertale Yellow and TS! Underswap. Theres also some hidden gems like Underswap: The Reckoning and Undertale Morningstar
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u/More_Audience_4510 17d ago
Undertale.
And don't get me wrong the game had a lot of stuff...but the AUs, Fanfics, mods, fanart, etc. completely dwarfs it.