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.

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 2: Base Perks (limited to two) Overkill - Lets you carry two Primary Weapons Double Time - Lets you crouch 30% faster and doubles sprint duration Battle Hardened - Grants immunity to Snapshop Grenades and minimizes effect of Flash, Stuns, EMPs, Gas Grenades, as well as Shock Sticks Scavengers - Lets you pick up ammo and knives from downed players E.O.D - Minimizes damage received from non-Killstreak explosives and resets the timer each time you pick up a live grenade Tracker - Lets you see enemy footprint trails, death markers, and prevents others from seeing your kill markers Pitcher - Improves equipment throw distance and lets you see the trajectory before throwing Extra Tactical - Lets you have an additional Tactical point