Though the campaign is a rip-roaring good time, it clocks in at a mere six hours long. The mode that will likely keep you coming back to Black Ops for months to come is, unsurprisingly, the competitive multiplayer. At its core, this is the familiar top-notch Call of Duty action that players have been enjoying for years. You earn experience for doing well in battle, and as you level up, you gain access to new and powerful ways to customize your loadouts. New weapons and maps freshen things up, and one of the new killstreak rewards–an explosive-laden remote-control car–is a delightfully deadly device that embodies the frantic, slightly goofy side of virtual online combat. The key new element, however, is currency. In addition to earning experience for your battlefield performance, you earn Call of Duty points, which you can then spend in a variety of ways. Most perks, weapon attachments, killstreaks, and equipment items are available early on, providing you shell out the points to equip them. Guns are still unlocked as you level up, but again, you have to pony up the points to put one in your loadout. Customization options like face paint, player card backgrounds, and the new create-your-own-icon tool are all accessed by spending points. Having to pay your way gives you more loadout options at lower required levels than in previous Call of Duty games, and the fact that points are so crucial to improving your arsenal makes them as just as sublimely satisfying to earn as experience points.