Must have games for Playstation 1

[UnderPantKnome]

Valkyrie Profile, imo it's a great game, just check out reviews or youtube. It's pretty expensive for an original copy.

There's the PSP version VP Lenneth, which is a port but I read it's a little bit inferior.

 

[Instan00dles]

jumping flash!!

 

[RaistlinZ]

Twisted Metal for sure. FF VII is a classic. Chrono Trigger is also good.