Floor It!

Floor It! is an achievement in Halo: The Master Chief Collection. It is unlocked by beating the 4 minute par time on the level Uplift Reserve. The achievement is worth 10 Gamerscore and can be unlocked on any difficulty.

This can be easily done by grabbing the first Warthog the player sees and driving past all the enemies, swapping it for a Ghost at the earliest opportunity and driving straight for the end. Doing this can also earn the Classic (if done on Legendary), One Way Ride (if done on Heroic or Legendary), Xenophobia and Deference of Darkness.

Trivia
The achievement name is a reference to the slang term of flooring, which means to drive as fast as possible. The only realistic way to meet the par time is to drive to the end as fast as possible.