This debug menu was hacked into the retail version of Halo Anniversary by people far smarter than I am. Since I had a copy of the game laying around, I figured why not take a look. In some ways, the debug menu is a bit disappointing, lacking wireframe modes and some more advanced debugging options. But hey, it was hacked into the game. What is there is a level select, cheats menu, and some other debugging options like a 3rd person mode. Check out the screenshots below, or check out the video to see it in action.