Too many I think;

 Dark Souls, Witcher 2(360), COD:BLOPS, MW3, MOH, Mass Effect 3, Battlefield 3, Halo Reach. That's just over the last two years, and the ones I actually remember :c. Really need to reign in my spending!

The ones I pre-ordered would be:
Resistance: Fall Of Man
Call of Duty 3
Motorstorm
Batman: Arkham City Collector's Edition

The only game I went into the store day 1 to physically get was Star Wars The Force Unleashed

A lot of my games are those bought a couple months after release or at the weekend of release, I don't like pre-ordering too much, I can just wait a couple days (speaking of which, gonna get Starhawk later! :D)

Damn near most of my 20+ Wii games. Unfortunately anything that wasnt made by Nintendo crashed in monetary value very soon after launch. Madworld is still a pain because of this >.

Halo: Reach
Halo: Combat Evolved Anniversary
Mass Effect 2
Mass Effect 3
The Legend of Zelda: Skyward Sword
Assassin's Creed: Revelations
Uncharted 3: Drake's Deception
Team ICO Collection
Gears of War 2
Gears of War 3
Super Mario Galaxy 2
Call of Duty: Modern Warfare 2
Batman: Arkham City
Resident Evil 5
Bayonetta
Dead Space 2
Xenoblade Chronicles
Prince of Persia: The Forgotten Sands
Splinter Cell HD Collection

Mass Effect 3
God of War Collection 2
thats about it I have bought many other for the full price but usually I don´t buy games on day one. Only if I have no other to play at the time

God of War: Collection, GoW: Origins collection and God of War III (ultimate edition)
Gears of War 1, 2 and 3 (epic edition).
Bulletstorm epic edition (only for the early access code for the Gears 3 beta, although Bulletstorm was a surprisingly good game)

And that's it, the next day 1 purchase will be God of War: Ascension (ultimate edition if there's one).

WI = Worth It, R = Regret

Halo 3 (WI)
Halo Wars (R)
Halo: Reach (WI)
Halo CEA (R)
Skyrim (WI)
Guitar Hero World Tour (R)
Guitar Hero Metallica (WI)
Fallout: New Vegas (R)
Red Dead Redemption (R)
Fable 2 (WI)
Fable 3 (WI)
Rock Band (WI)
Rock Band 2 (WI)
Rock Band 3 (WI)
Two Worlds II (WI)
Bulletstorm (R)
Dirt 3 (WI)
L.A. Noire (R)
Forza 3 (WI)
Forza 4 (WI)
Gears 3 (R)
Rage (R)
Portal 2 (WI)
The Witcher 2 (Not sure yet)
Mass Effect 3 (WI)

All in all I've spent far too much.

Super Mario Galaxy
Super Smash Bros Brawl
Mario Kart Wii
The Legend of Zelda: Skyward Sword

Excite Truck (Wii)
Warioware: Smooth Moves (Wii)
Mario Kart (Wii)
Burnout Revenge (X360)
Gears of War (X360)

Skyrim and Battlefield 3 pre-order. Also have Diablo III on pre-order.