Steam is hosting yet another fantastic weekend sale with a 50%-off, $10 copy of Mass Effect. Originally released for PC in May 2008, Mass Effect is an action role-playing game developed by BioWare (Demiurge Studios handled the PC port).

The game takes place in the year 2183, and puts the player in the shoes of Commander Shepard, an elite human solider who has set out to explore the Galaxy. The title received wide critical acclaim, with an average GameRankings score of 89.78% on PC 90.71% on the Xbox 360. A sequel (Mass Effect 2) is slated for debut on January 26, 2010.

Steam's listed system requirements include Microsoft Windows XP SP2 or Windows Vista, a 2.4GHz Intel Pentium 4 or 2GHz AMD processor (or faster), at least 1GB of RAM on XP or 2GB on Vista, an ATI X1300 XT/Nvidia GeForce 6800 or better, and 12GB of free storage space.