The problem with the internet is controlled, it is that one discovers only once in hands the indications on the case. In this case here, we must have a Steam account to install and unlock the game. Of course free to enter, but what a useless "strings attached" all it takes ALSO MORE enter the unlock code present in the housing of the game. With games that require a permanent internet connection to play, and / or the parties that back "cloud," and that I have given up to acquire foul play on holiday in a connectionless area internet, the gaming industry continues to shoot balls in the foot, and give the feeling to the original purchasers would be less bothered with a pirated version ... Otherwise, apart from that, my son freak Sonic is delighted with the game, which corresponds to its expectations.