>>994313You could try this recommendation website:
https://apps.quanticfoundry.com/recommendations/gamerprofile/videogame/ Or check out flowcharts like this one:
https://i.imgur.com/tpMIMpX.jpegThere are some old and obscure games here
https://legendsworld.net/adventure/faq but I'm not so sure about the quality.
Furthermore, I'd personally recommend:
Pathologic 2 (truly a gem; perhaps a tad difficult, but I'm sure that won't be a problem)
Omori (play this one blind)
Night in the Woods (small town mystery)
Ace Attorney Trilogy (well written, fun mystery and many puns)
Peter Gabriels Eve (old music and art game)
Portal 1&2 (classics, you can get them for 1€ on steam summer sale)
Monster Hunter World (fight big stuff, like in dark souls but brighter)
SuperGiant games like Hades and Pyre (good art, good music)
Okami (same here, the pc port is actually good as well)
To the Moon (sad little rpg game)
Ib (short rpg horror game but its free)
Yume Nikki (same with this one)
Grim Fandango (really good writing)
Hotline Miami (more than meets the eye)
Sunless Sea (might be really boring if you don't like reading, very atmospheric lovecraftian)
Higurashi and Umineko no Naku Koro ni (a whole lot of reading)
VA-11 Hall-A: Cyberpunk Bartender Action (another visual novel I like)
AudioSurf (mindless music game that you can pick songs for)
Fallout New Vegas (you've probably already played this, but just in case)
Celeste (fun platformer)
Sanguine Sanctum (a bit weird and abstract, but cheap, fun and short)
Space Bear (free space bear game)
M.U.G.E.N.
For these you might need either a console or emulator:
Mother 2&3 (since you like undertale, you might enjoy the humor and personality)
Chrono Trigger (timeless classic for a reason)
Dragon Quest 9 (well written and fun)
Metroid Zero Mission (another personal favourite, well designed and suspenseful)
Pokemon Mystery Dungeon Team Red&Sky (Okay, this is 100% nostalgia, but I stand by it)
Radiant Historia for 3DS (time travel fun)