http://www.gamewallpapers.com/

GameWallpapers比較想要的都是收費的 囧rz
但還蠻多規格的

800x600
1024x768
1152x864
1280x960
1280x1024
1400x1050
1600x1200
480x272 (PSP)
1280x768 (16:9)
1280x800 (16:9)
1440x900 (16:9)
1680x1050 (16:9)
1920x1200 (16:9)