Broken Sword: Shadow of the Templars: The Director's Cut Wallpaper

A most excellent desktop wallpaper for classic adventure game lovers.

Zelda: Phantom Hourglass Wallpapers

Here they are.

Sonic Colors Wallpapers

Lots of them: here, here, here and here.

So Blonde Wallpaper

Be Blonde!

Super Scribblenauts

The forthcoming puzzler for the DS/DSi has got a lovely HD wallpaper for you. Courtesy of destructoid.

Funky Band Hero Wallpapers

Right from the official Band Hero headquarters.  

Elite Beat Agents Wallpaper

Elite Beat Agents -by far one of the quirkiest DS games around- oozes style and disco from every pore. Why not have it grace your desktop? Why not indeed.

LEGO Batman Wallpaper

Haven't played the game myself, but I'm pretty sure it can be that bad. Besides, it does look the part and so does this high-res Lego Batman pic for your desktop.