The Covenant (Halo 3)
“Breach the barrier. Stop Truth” is the description for this level, but as is the case with these games, it’s a lot easier said than done.
Sure, everything starts out simple enough. Chief (and maybe Arbiter) go to shut down one shield tower, while separate teams handle the other two. Grab a Warthog, take out the Wraith turret and the aliens on the cliff, then head inside and deactivate the shield. So far, so simple. Hopping into a Hornet and shooting down Phantoms, piece of cake. Sure, the Flood shows up and things get a bit hairy, but nothing you can’t handle.
The real problem comes when you’re asked to go up against two Scarabs at the same time. Truth really doesn’t want you to stop him from firing the rings. The level isn’t just the standout mission for this particular game, it’s also the last level in the entire trilogy where players fight the Covenant, which also explains why it’s the longest level in the trilogy. As a finale to the war with the aliens, this level certainly makes sure to go out with a bang.