Undertale!
a very fun 2D RPG that goes for Microsoft Windows, OS X, Linux, PlayStation 4, PlayStation Vita, Nintendo Switch, Xbox One, Xbox Series X/S (Okay seriously, I suppose this thing works on my toaster as well xD)
And as for LGBTQ+ characters...*Joint cracks*... *Inhales*...
.
.
SPOILERS!
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
FRISK (MAIN CHARACTER): AGENDER!
SANS AND PAPYRUS: ASEXUALS!
UNDYNE: LESBIAN!
ALPHYS: BISEXUAL!
METTATON: GAY!
CHARA: AGENDER!
TWO ROYAL GOARDS: GAY!
BASICALLY EVERYONE!