There are five different and unique classes the video game Call of Duty 4:

1. Assault
2. Special Ops
3. Light Machine Gunner
4. Demolitions
5. Sniper

Players can also customize up to five classes with weapon customizations and load up to three perks.

1. First time players can only use three of the five preset classes
   1. Assault
   2. Special Ops
   3. Light Machine Gunner
2. Other classes can be unlocked by gaining experience when playing multiplayer matches online.
3. Players can customize classes with various perks and weapon customization
4. Players can create classes when they have gained enough XP to become Lance Corporal.
5. Gaining level 55 unlocks Prestige mode

In Call of Duty 4 there are 5 basic classes: -Sniper -Light Machine Gunner -Special Ops -Demolition -Assault

Players are not limited to these 5, though. They have the option of creating their own with weapons and perks that are unlocked as they level up online. This page is a compilation of classes that have been proven effective multiple times.