Very Difficult.
But here goes:
10) Ratchet and Clank: Locked and Loaded
9) Jak and Daxter: The Precursor Legacy
8) Bioshock
7) Spyro 1
6) Ratchet and Clank: Up Your Arsenal
5) Sypro 2
4) Gran Turismo 3: A Spec
3) Super Mario 64
2) Spyro 3
1) THE ULTIMATE DOOM! *
(I love this game as I completed it 100% when I was 3, never done it since ;))