Hey theres so much spam in here I tried looking to see if these were found but stiff keeps getting posted so whatever if it's been posted don't flame just tell me. Anyways...
1. Is done at last jumper leading from PHD to the indoors room directly accessed by the dome. You can stay on this lander if you simply face it and move toward/sprint in air toward the platform. It needs to be low gravity to do this.
2. There's another bug that takes place on three landers including the very middle one and two leading from phd to the indoors room. You can go in a loop and stay up on the platforms forever. you have sprint the direction you want to go and jump to control, my friend found this one and he had to get off before he could tell me the complete glitch.
3. Have 3 players in a game and when you get to the dome one player must go on the jumpers and turn off their xbox while in the air. Every zombie on the map will run to the spot where they timed out and you can kill them easily.