pereh: No Win 7 support, really?
AB2012: It appears to work fine on W7. It's just another one of those games where "No Windows 7 support" doesn't mean it doesn't work, it's just where the developer randomly decided to choose Windows 8.
It's not really random. Windows 7 has fallen out of support for months now.
If I were a developer, I certainly would not declare it to work on Windows 7 for a new game even if I'm extremely certain it should run. If I officially support it, I have to give support for it. If I give support for it, I need at least a test machine with it around (and my debugging tools need to support it).
Setting aside the extra work and potentially extra hardware, it's also a difficult to quantify security problem.