At the 2010 Comic-Con being held this week in San Diego, Bungie has revealed two new modalities that will be part of
Halo Firefight: Reach. One of these will allow players to play as the Covenant, more specifically the Elite along with all the different races are controlled by the CPU, and launch the attack of the Spartan III. The other, called "Gruntpocalypse" you will see players confront hordes always more numerous than Grunt. We show below the video, unfortunately in low quality mode of "Covenant vs Spartan" shown at Comic-Con 2010.
Halo: Reach - Comic Con Panel 2010 Bungie: Halo vs Reach Firefight