Killstreaks are one of the Call of Duty franchise's greatest contributions to the first-person shooter genre.

The first CoD game to feature killstreaks in online multiplayer matches was Call of Duty 4: Modern Warfare, which released on November 5, 2007, and they have continued to appear ever since. Rewarding players for firing a string of frags against the enemy motivates people to play smarter and rack up kills for their team. This can only be a good thing, because generally speaking, the better a player performs in a match, the greater the impact he or she has on helping his or her team win.

Over time, the concept of killstreaks has evolved within the CoD series, with more options and tools to use in matches, and multiple game types that utilize killstreaks in different ways.

Killstreaks in CoD caused a huge stir among players and changed multiplayer forever. Below is a list of the top five CoD killstreaks that we will never forget.