Here's a tutorial on how to make a 3D-ish game. It's not really Call of Duty 3D, but more like Luigi's Mansion 3D. Don't judge me for using Wallace as an example! I like W&G. Use the arrow keys to move on the parts where it tells you to.
Well, everything is by me, except the images are from the photographers that work at Aardman. When using this in games, in Notes and Credits, please credit me!