EASTER EGG #18 - George Costanza Grunt
This charming fellow awaits you near the very end of the last mission. When Cortana says "90% left, Chief," that's your cue to start searching for him. Our video will guide you straight and true.
"The jerk store called and they're all out of you!" This could be the most adorable Easter Egg in gaming history. George Costanza Grunt, can we adopt you?