Installed it and activated it just fine hating every minute of the whole 'steam' experience. Can NEVER play it in 'offline' mode. Steam just errors out when I click on 'offline' saying something to the effect "cannot reach Steam servers", pukes and closes the software, and I don't get to play on airplanes, etc. which is the kind of time I bought the game to play in the first place. Yeah.. there is a tiny little disclaimer on the front of a very 'busy' box telling you that oh.. by the way... did we forget to tell you that purchasing this game means you HAVE to sign up for our advertisement laden social media outlet disguised as a patch download manager? Also, that you MUST have Internet access to play unless you go through hoops each time you load the game? Honestly, after this nightmare and Civ 5 I will never buy a game again that requires STEAM, IMPULSE, or any other software than the game itself. Does that mean I never buy a PC game again and only buy for my various console systems... I guess it might.