The highest level is 50 and Prestige Mode will return.
There are 15 levels of prestige.
In the Black Ops rank system, the player must level up to unlock weapons for purchase.
Drivable vehicles will return in the form user-controlled killstreaks such as the RC-XD and Chopper Gunner
Some campaign levels will be based off multiplayer maps instead of the typical vice-versa. This change is because some multiplayer maps had been made before the campaign was finalized.
Players can now record, manage, edit and upload in-game video clips to their file share via "theatre mode."
Matchmaking is being changed so that it is easier for friends to play together, and there will be a regional filter
In Game Currency will be used to purchase weapons and upgrades.
Split screen online for the Xbox 360 and PS3 has been implemented.
Unlike in World at War, submachine guns will have full movement speed while aiming down the sights, as they did in most other Call of Duty games.
One will be able to make custom game modes in private match, for example pistol-only games.
Wager Matches -
A new mode with a separate ranking structure than the standard online modes, will allow players to gamble with their money. However, only the top three will receive the prize. They will be placed into one of four random modes:
One in the Chamber - each player is given a pistol with one bullet and a knife. For each kill achieved the player will receive one more bullet. However, each player will only have three lives.
Sharpshooter - each player is given the same random weapon. The weapon will be used for 45 seconds before being switched out for another one. Kills will award the player with perks and score multipliers.
Sticks and Stones - each player receives only a crossbow, ballistic knife, and a Tomahawk. The catch in this gamemode is that if the player was able to hit an enemy with a Tomahawk, the enemy player will go "bankrupted".
Gun Game - players start out with a pistol. For each kill they move up a level, granting them a better gun. First person to achieve kills with all 20 weapons wins. However, someone who is knifed will move down a level.