If you've just bought this game, beware! You're just about to lose virtually all of your free-time, this game really is that addictive. On first glance, Call of Duty is a game with a good (if not particularly enthralling) single player mode and a multiplayer mode that people will try after racing through the single player. However, it is the multiplayer mode that really makes this game.

Players can battle it out in games of up to 16 players across a wide range of modes including sabotage, old-school and the good old team death-match. The maps are all well designed and offer plenty of places for both careful, sneaky players and 'run and gunners' to ply their craft against the enemy. Players can also create up to five different classes for their virtual soldiers using a vast array of weaponry, from sub-machine guns to rifles and rocket propelled grenades. The multiplayer experience is also lengthened by the ability to level up by gaining experience and then completing 'prestige mode' after level 50. The entire experience is made even better by the use of headsets which allow players to communicate directly to one another, really adding to the realism of the game.

This really is one of the best online shooters out there, full stop. Whilst the single player may be over quickly, the multiplayer will keep you returning for months.