Perhaps the most ridiculous achievement in all of halo 4 is the "midnight launch" achievement. To get this 20 gamerscore achievement , all you have to do is:
1) go to the first rally point in "requiem".
2) make sure its 11:50 or something (give yourself 10 minutes)
3) go past the crash-sight, strait forward until you get to a hole in the right side of the wall.
4) Get to the part where you find a warthog thats still usable.
5) Get in the warthog
6) wait until midnight, and move forward , the first jump you get wont get you the achievement , but one of the hill edges will!
[video width=540 height=315]https://youtube.com/watch?v=ahdpmsG3x-o[/video]