The competitive multiplayer still has the basic progression of the rich getting richer. You unlock more powerful equipment and abilities by leveling up, which is just a matter of time, even if you suck. All good guns come to those who grind. But the Killstreak system, which awards the most spectacular toys, has always been a boondoggle for the better players. By racking up consecutive kills before getting killed yourself, you get the best gear. But for many of us, the "not getting killed yourself" part can be tricky. New to Modern Warfare 3 is perhaps one of the single most important additions for us: the Support Killsteaks.