User blog comment:Bovell/Color blind assist option for Modern Warfare 3. Killstreak system reworked./@comment-108.38.53.149-20110709061339/@comment-85.195.135.6-20110710092331

killstreak stacking is what hapenned in mw2 that they took away in black ops; for example you get your pred. missile and then get 2 kills with it you get your harrier, whereas in black ops if you get 6 kills with a napalm strike you still have to get 6 kills with your gun to get dogs or whatever