Halo 4 Cheats :
Easter Egg - Red vs Blue Episode 2 Easter Egg
In Episode 2, Chapter 5, right at the beginning of the level, stick to the left part of the map until you go into a forest-type area. Keep sticking to the left paths until you see a glowing blob on the wall. Right below it, you should see a little box hidden in the bushes, shoot it.
Continue to play the level, and you'll hear Caboose, Church, Grif, and Simmons throughout the level.
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