Bro just torrent that stuff, buying them is only good for unlocking achievements. And not to sound like a boomer but video games are a waste of your time and addictive af, but with that said:
Single player (my GPU is trash so these are all games that can be played on a shit PC):
CK2
Rimworld
XCOM 2
Terraria
S.T.A.L.K.E.R
Papers please
This war of mine
Multiplayer (don't talk shit or these Jews will ban you without hesitation):
League of legends
Call of duty (though be prepared to get unwanted BLM-shit forced on you)
Counter-strike: Global Offensive
I think multiplayer is pretty trash these days and the games that do look semi-decent I can't play because my PC is shit.
Don't ever play Undertale btw, it's very gay.