None. That's my problem with Playstation. There have been tons of great games to grace the brand, but none of them defining. Playstation doesn't have a core. Nintendo has Mario, Sega has Sonic, Microsoft has Master Chief...
Retro Tech Select - My Youtube channel. Covers throwback consumer electronics with a focus on "vid'ya games."
Latest Video: Top 12: Best Games on the N64 - Special Features, Episode 7