Call of Duty: Modern Warfare II will likely be the first Call of Duty game to get two years of support. It's understandable if Activision Blizzard and Infinity Ward want to pack the game full of content that it can tweak and upgrade to keep fans occupied for two years if not a lot longer.

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As revealed at the Call of Duty Next event, MWII will feature a revamped Perk system.

The upcoming Call of Duty game isn't the only one to have this franchise staple. However, MWII is making noteworthy changes.

Here's a quick guide to help you understand the Perk system for Modern Warfare II:

The gist is that Modern Warfare II grants you four Perks in total: two Base, one Bonus, and one Ultimate. You can choose from pre-made Perk packages or create up to five.

As for the Bonus and the Ultimate Perk, you'll earn them every four and eight minutes, respectively. However, you can speed up your timers by killing enemies, getting assists, and completing objectives, among others. For example, you take one second off of your timer every ten points you get. The more enemies that you'll kill, the faster you'll activate Bonus and Ultimate Perks.

In other Call of Duty news, Activision Blizzard and Infinity Ward finally revealed the release date for Warzone 2. Also, PlayStation owners who pre-order Modern Warfare 2 will get exclusive content. Finally, Modern Warfare 2 will be getting new modes, including a third-person perspective mode, among others.