The Firewalker expansion for Mass Effect 2 will be released at the end of March, according to Bioware. In it you get play with the combat vehicle Hammerhead in five new missions, which makes me a bit nervous since I hated the Mako. It will be better than the Mako, right? Anyway, the pack is completely free if you are a member of the Cerberus Network, which you are if bought a new copy of Mass Effect 2. If you didn't, then EA will try to get recoup some money from you somehow (all according to their $10 Project) and you'll get to pay for it.