try crash twinsanity for ps2. old and glitchy but a funny story and gameplay that is moderately challenging depending on your experience level with crash games idk ITS FUN OKAY just have a go at it
" I'm an evil scientist, what do you expect? This isn't a game."
Ive been playing some sourceSDK shooters like fistful of frags and double action boogaloo, they're pretty fun and run ok on low specs