My all time favorite game is Grim Fandango.
Then followed by Psychonauts (Xbox version and not PC version because I perfer playing on my Xbox 360 controller - best controller ever)
Then these in no order:
Panzer Dragoon series (Sega Saturn) - Never played Saga, but I'm sure it would be the best game of Sega Saturn like many have claimed.
Otogi [Myth of Demons & Immortal Warriors] (Xbox)
Virtua Fighter series (Arcade/Sega Saturn/Dreamcast/PS2/Xbox 360)
Fatal Fury: Mark of the Wolfs (Dreamcast)
Ninja Gaiden 1 & 2 (Nintendo Entertainment System)
Ninja Gaiden (Xbox)
Shining Force [1, 2, & Sword of Hajya] (Sega Genesis/Game Gear) - Sadly never played the Sega Saturn version, but heard a lot from it.
SNK vs. Capcom: Match of the Millennium (Neo Geo Pocket Color)
SNK vs. Capcom: Card Fighter's Clash [Capcom & SNK version] (Neo Geo Pocket Color)
Skies of Arcadia (Dreamcast)
The Elder Scrolls III: Morrowind (PC/Xbox version - either way)
The Elder Scrolls IV: Oblivion (Xbox 360 version of course with the best controller)
Castlevania: Symphony of the Night (Playstation/Xbox Live Arcade)
Mario 64 (Nintendo 64)
Phantasy Star 4 (Sega Genesis)
Phantasy Star (Sega Master System)
Final Fantasy 2 (Super Nintendo)
And last to just joke around...
1. Sneak King (Xbox/Xbox 360)
2. Pocket Bike Racer (Xbox/Xbox 360)
3. Big Bumpin (Xbox/Xbox 360)
The Burger King games rawked hard! For $4 bucks each, they were worth it! BEST $4 BUCK GAMES EVER!
