Regret Vacation

To get to the vacation on the Level Regret, play the level up until the point where you have exited the second underwater elevator. Continue to the area outside swarming with enemies, kill all the enemies and wait for the pelican arrives. When the pilot says "This is my last run Chief", look for a small bulge of land near the far left of the hill wear the Elites were. Jump on this ledge and when the Pelican has lowered near to the ground, jump onto the Pelican and hang on and jump of at this ledge and countine to the mountain.