The mighty power of the Latsirian Empire will rise again!
Level - Uplift reserve
Just hop in a warthog and drive down the first canyon like area and stop at the fist outpost to get in the ghose (Which is located next to a rock. Then proceed to boost trhought the level.
NEVER LET ANY MARINE INTO YOUR WARTHOG! It will cancel the achievement if they shoot at all.
NEVER HONK. it will cancel the achievement also.
Just never touch the shoot trigger AT ALL.