The recently released demo for Mass Effect 2 is now available through Steam. Here's a reminder of what the sample of BioWare's RPG sequel is all about: "In the demo, players step into the role of Commander Shepard and must escape from a Cerberus space station under siege. Players can jump ahead to a later mission where they must rescue Subject Zero, a hardened, dangerous criminal from a heavily guarded prison ship. Once they play the demo, players will be able to create a save and carry over their character along with the experience points, story decisions, achievements and weapons earned into the full version of the game – picking up right where they left off, on both PC and Xbox 360."