Were It So Easy...

So, for those of you who've been living under a ROCK and haven't played, seen, or at least heard of HALO, let me sum it up for you.

Earth. In the future.
Alien religious zealots known as the Covenant start a big, fat war with Earth, babbling something about how they're the righteous souls in the universe and how all of us humans are dirty, icky insects that should be destroyed. During the course of this war, one particularly bad-ass soldier, known as Spartan 117 or the Master Chief, discovers a strange structure called a HALO. It's the size of a fairly hefty planet, but it's a perfectly flat, terra-formed ring. Hence the name. Well, turns out that all the HALOs are actually gigantic incendiary devices that will actually destroy every sentient being in the galaxy if they go off.
Now, why would anybody build something like that? Why, to contain the Flood, of course! The Flood are... icky. They are a collective consciousness, made up of billions of what used to be sentient beings. Once infected, however, any personality or intelligence they once had is absorbed into the whole. The Flood is more than capable of consuming every living thing in the universe, which is why the HALOs were built- to kill their food.

The trilogy is quite the firefight between Earth's Marines, the Covenant, Covenant outcasts, and the Flood themselves. It ends when Master Chief finds a single HALO that's outside the range of the rest. Luring the Flood there and detonating the thing would only destroy them. So, that's what you do.
You walk onto a planet-sized bomb, HOPING that a lethal enemy will follow you en masse, then you arm this gigantic bomb and try to get the hell out of Dodge. Now, this HALO doesn't explode all at once. No, sir, it blows up in little bits and pieces while you're wrestling with an SUV and trying to drive the twenty some miles to your ship so you don't go splat. Entire pieces of terrain will explode and blow debris everywhere, crap you're currently driving on will fall into a mass of fire and molten steel, and the Flood is still trying to kill you. Believe it or not, it is still kind of fun. And you can have some very interesting conversations when you're trying to reach that damn ship.

Doktor: Wait! Stop! Stop! You need to go left here!
Bunny: What??? Eeek! *GAME OVER*
Doktor: Okay! Get there again... See! There! Go left!
Bunny: Like this?
Doktor: No, now you're trapped.
Bunny: I thought you said go LEFT?!
Doktor: I did!
Bunny: I WENT LEFT!
Doktor: Well, you went left too soon.
Bunny: Oookay... I'm there again. So I go straight?
Doktor: No, right now you need to go right.
Bunny: ??? The way I was going to go in the first place?
Doktor: Yes, now you can go left. JESUS! HOLE! HOLE!
Bunny: What??? Eeek! *GAME OVER*
Doktor: I told you there was a hole there!
Bunny: I DIDN'T SEE IT!
Doktor: Okay, go around the hole... Umm... Look... Look... DO YOU SEE THE GIGANTIC PILLAR FALLING DOWN IN FRONT OF YOU?!
Bunny: YES! YES! I SEE THE GIGANTIC PILLAR! *barely escapes certain death*
Doktor: Now, you need to watch it up here... The path is really narrow...
Bunny: What??? Eeek! *barely escapes certain death*
Doktor: I TOLD YOU THE PATH WAS NARROW!
Bunny: YOU NEVER MENTIONED HOW NARROW! YOU DID NOT GIVE DIMENSIONS!
Doktor: But I told you!
Bunny: ... I still didn't fall off!
Doktor: Barely... Oh! Oh! There's the ship! Go! Go! Gun it! Go!
Bunny: I see it! I see it!
Together: Yaaaaaa...!!!