This is a basic strategy for anyone going for the PAR TIME achievements in Halo: CE, and some tips to help you obtain any PAR TIME achievements if you don't get them running through the game.
-The first and biggest tip of all is... PLAY ON EASY
-2nd tip is: Run past ANY ENEMIES POSSIBLE and that are not required to be killed.
-3rd tip is: Same as running past enemies, if there are any Ghosts, Warthogs, or Banshees that are within you grasp, get them and run past everything you can.
-4th tip: Grab the Overshield powerups or Invisibility powerups! they are both extremely useful to get past enemies.
-5th tip: Know the level! Knowing the level will help you so much! If you know where the powerups are, vehicles, and best weapons like the shotgun or rocket launcher.
-6th tip: If you have a blocked door or entry way, grenades are great for creating paths, enemies (especially Elites) jump away from grenades!
7th tip: Try to keep a pistol on you because its the most basic precision weapon in the game and kills Hunters in 1 bullet if shot in the back!
If anyone has any questions or more tips to add comment or message me and I will add them. These aren't step by step solutions to get through the mission but Knowing what to do helps!
Good luck and Have fun!
BY THE WAY FOR THIS MISSION I GOT THE ACHIEVEMENT BY GOING FOR A DIFFERENT ACHIEVEMENT:
If done right you can get 2 birds with 1 stone.
Video was done by Korbek gaming going for the pacifist achievement, will also unlock this achievement in the process.