World of Tanks is an incredibly good game, better than anyhting CoD has ever dreamed of achieving as a multiplayer experience. Massive maps, massive tank battles, massive tanks, a huge number of options for upgrading your tanks, a wide 'tree' of tanks to earn and upgrade, 15 v 15 player battles... A brilliant game for absolutely nothing. You can purchase stuff for faster upgrades and access to selected tanks but you absolutely can play this game for months without spending a single penny on it. I'd say it is a must own multiplayer game for anyone who has any interest at all in multiplayer gaming. Knocks CoD out of the stadium for depth and challenge. Are there downsides? Yes, you don't respawn. Once you're dead you are out of the battle. However, even that is compensated for because you can go back to your garage and choose a new tank to start a different battle while your other match finishes, you just can't use the same tank. And while you enter a new battle your previous xp and silver (needed for upgrades) automatically gets added as soon as your previous match ends. A total triumph of a game, an essential download IMO.