Got my copy of Halo for the PC the other day and have been playing for a while. Heard "Killtastic!" for the first time today from the game's announcer. That was pretty funny. I was attempting to take over the hill on "King of The Hill" and when I arrived at the hill on foot I saw maybe 6 or 7 enemies defending. Happily I had Invisibility, Shield, a handfull of grenades, and the Fuel Rod gun. Heh. When I gleefully unloaded on them with a big grin on my face I heard, "Double Kill!", "Triple Kill!", then "Killtastic!". What a riot.