The campaign is short and boring, but the multiplayer makes it worth buying.
Career is short. There are only ten easy levels. Don't judge the game on this overview of the career. What you do in career dose affect what you can do in multiplayer. Depending how well you do in the mission is how many weapons, gadgets and people you get in multiplayer. (cheat to unlock all people "party")
Multplayer is one of the best first person shooter multilayer experience ever. You can do from 1-4 people playing. There are at least 20 different modes in multilayer. You can pick from about ten weapon sets. This is a good party game. My friends have spent Hours playing this game. If you want to have lots of people and modes in multplayer do the best you can in career. You can also have up to 5 bots where the computer plays a person. You can make them easy or hard.