BEWARE: GAME ENDING BUG
THE LEADUP:
After beating the first boss, you are instructed to get into your moon buggy (Warthog) and drive to the second hatch. After driving a ways, you come to a row of silo-shaped beacons. To your right is a parking spot. Most people, including me, would park the Warthog on that spot. That's what it's THERE FOR, right?
THE PROBLEM:
No, it's not. If you park it there, then go traipsing on foot past the beacons and into the second hatch, you may as well restart your game.
WHY?
Because after beating the second boss, you will be told to return to your Warthog and go somewhere else. Upon stepping once more onto the platform, a cutscene will immediately interrupt you (doesn't give you time to enter the buggy). After you ascend what's apparantly an elevator and regain control, the Warthog will be GONE, and you will be SCREWED. You cannot get to the next area on foot.
WHAT SHOULD YOU DO INSTEAD?
Park the buggy next to the beacons, and NOT on the elevator. After beating the second boss (yeah, he's hard), go back outside, enter your buggy, and DRIVE IT onto the elevator.
This is a really horrible bug, given that:
1) You didn't know it was an elevator; and,
2) It looks like a parking spot.
So thanks, Renegade Kid! Watch out for this, readers!