Antimateria: I bought it from gamersgate and there read that there isn't multiplayer. What's up with that? It's just weird if it normally should have multiplayer-mode.
gyokzoli: The multiplayer works via Steam only and that's why the developer made a single player only version since at the time the game was re-released, DD stores other than Steam did not want to sell Steamworks games.
Fun fact. They do sell also steam games. I saw some game in there which needed steam for that you actually can play. So it's just odd. That AVP game in GG was drm-free. Well.. it was a good buy still with a bit over one euro.
I own many games nowadays in steam.. And now I also I'm beginning to understand why some hate that kind of restriction.