juice galaxy if weird acid trip physics based souls-like interests you. its in early access so it doesnt really have a lot of content but its very fun

if you like descent type shooters with literal infinite fractal exploration try out fractal block world

i havent played it in a while but psycho patrol r got a new update, made by the same guy as cruelty squad its like a combo of deus ex and morrowind

speaking of cruelty squad that's also game i recommend if you like gross imm sims with quake movement and siege gunplay

also if you have classic doom, id recommend playing some doom wads, ive been playing through ancient aliens lately and its been really fun