I've got probably around 25 unopened/unplayed games. Currently working my way through Paper Mario: TTYD (GC), Trauma Center (DS), and Castlevania: Circle of the Moon (GBA).
Among the games yet to be played:
Halo (despite beating single player in Halo 2 and playing on live frequently)
Castlevania: Dawn of Sorrows
Indigo Prophecy
Phoenix Wright
Max Payne 2
Spider-Man 2 DS
Ridge Racer DS
Sonic Rush
Prince of Persia: Warrior Within
Golden Sun
Pokemon Leafgreen
Castlevania: Curse of Darkness
Gauntlet: Seven Sorrows
Soul Calibur 2 (XB) (Up for trade)
Lord Of the Rings: RotK (XB) (Up for trade)
plus a couple of light gun games (loved the Time Crisis series, I figured I might as well put my guns to some use
)
Vampire Night
Ninja Assault
Resident Evil: Dead Aim
Dino Stalker
There's more that I can't think of, I might update my post when I get home with the rest of my backlog
Edit: Almost forgot, Kirby: Canvas Curse and Max Payne are on the way to me, thanks to goozex.com.