Strike Chain

The Strike Chain system in Call of Duty: Modern Warfare 3 replaces the Killstreak system used in Modern Warfare 2 and Black Ops. When the player achieves a certain amount of points without dying (a pointstreak), bonuses are gained.

The Strike Chain system was invented to reward players not just for killing other players, but for completing objectives in team gamemodes, but they are also rewarded for every 2 assists they get when using Hardline Pro. When a player reaches their last reward their Strike Chain will start over without them having to die.

The Strike Chain rewards are divided into three different Strike Packages, with players being rewarded with different equipment, support or perks, depending on which Strike Package is selected.

The three Strike Packages are Assault, Support and Specialist, with Support being the only package that continues the Strike Chain through death, and Specialist exclusively dealing with additional perks. As in previous games, only three rewards can be selected at once. Some rewards cross over both the Assault and Support Packages, but require a different amount of points (for example, a UAV in the Assault Strike Package requires a Chain of 3, but requires a Chain of 4 in the Support Strike Package).

Specialist Strike Chain
The Specialist Strike Chain rewards are locked at Point Streaks of two, four, six, and eight. At two, four and six a player using the Specialist Strike Chain is granted an additional Perk. Once the player gets a Point Streak of eight they are given every Perk in the game. All Perks obtained through the Strike Chain are lost upon death and must be re-earned.