Well, I thought I'd make a thread where we can post what games we've beaten 100%. By games, I mean video games released on a video gaming console, not a Flash game on your mom's computer. Here's what I've beaten:

Super Mario Galaxy
Super Mario Galaxy 2
New Super Mario Bros.
New Super Mario Bros. Wii
Super Mario 64 DS
LEGO Indiana Jones: The Original Adventures

I'm also working on Kirby Super Star Ultra. I have 97% of it done. I just need to beat The Arena and The True Arena.

1. Pikmin 2
2. Kirby Squeak Squad
3. Super Mario World GBA

Far too many to count. I may also be ashamed of some of the games I completed in such a way, so I won't list them for that reason as well.

Assassin's Creed 2 and Brotherhood

EDIT: I supposed I could include SMG1 to the list, but I never got the Luigi Stars

Pokmeon Ranger, Original.

And a few others, Pokmeon RPGS are impossible to finish all the way.

Im going to only include games from the last 10 years. Any further than that and the list would be too large.

Bioshock
Shadow Complex
Infamous
Saints Row 2
Picross 3D
Super Mario Galaxy

thats about it.

The only games I really 100% tend to be Metroidvanias.
Last one was Shadow Complex, I think.

Super Mario Galaxy
Super Mario Galaxy 2
Sonic Adventure 2 Battle
Sonic 3 & K
Sonic CD
Sonic Colors (Wii)
Kirby 64
SSB Brawl
Sonic Rush
Super Mario 64
New Super Mario Bros. Wii
Sonic 4 - Boring game.
Ape Escape
Ape Escape 2
Mischief Makers

That's all I can think of at the moment.

Whoa, that's quite a few. Congrats on completing all of them!

I have a short attention span and get bored after a while but.

Banjo Tooie XBLA
Banjo Kazooie XBLA(unless you count achievements in which case Im one off)
Every game in the Monkey Island series but escape.