slamelov: Yes, it's DRM. If I want to play in LAN with my sons, I need to buy two more copies.
It's worse than that, you can't really play over a LAN. I mean, yes, you can play through a LAN provided every user in that LAN has internet access. But if you try to setup a LAN party with your friends in a place with no internet access (yes, incredible as it may sound, these places still exist in the darkest corners of the earth) guess what, you can't.
I have the game, I think it's amazing and worth every penny, and I will still play it sp and mp, but this online multiplayer check thing is still f*ing annoying, and I only hope when Triumph servers finally go to server heaven (as many other game servers have gone before) they will release a patch to allow users to keep playing.