My favourite game on Playstation 1 and Playstation is Final Fantasy VII. I just can't get enough of that game. The story lines, characters, battles, music...*sigh*
Crash Bandicoot games Tomb Raider games Spyro the Dragon games Rayman Croc Jumping Flash ... and there are so many more, too many to remember off the top of my head
Tomb Raider, Spyro the dragon, and Gran Turismo! I can close my eyes and remember the feeling of my first game loading on my 1st PS1. Awesome stuff!
GTA4 on PS1? Love the GTA4 pigeon challenge. You need to hit all 200 pigeons in the game. Some are hectic difficult to find, and some are in positions where you will alert the police once you shoot. Very challenging. I've also heard of the online play base jumping tournaments. You need a partner to drive you to 10 different jump sites. Once you base jump the building, get to your buddy in the gettaway car and go to the next one. The challenge is that anyone also involved in the online play can take you out. Such a cool concept!