Namco Bandai's announced the PC version of Dark Souls will come to Steam after its initial announce came without an announce on the Valve platform.
The PC version was announced back in May, but was down for Games for Windows Live only at that time. A petition to release the RPG onto Steam was met with under 23,000 signatures.
Namban's also announced the console version of Dark Soul will get the previously-exclusive PC content as DLC this winter, called Artorias of the Abyss. It'll cost 1200 MS points on 360 or $14.99 on PS3.
The DLC will include more explorable areas, new enemy and boss types, new NPCs and more.
Dark Souls: Prepare to Die Edition launches on August 24 on PC. A console version of the Prepare to Die Edition will launch this winter.
There's a trailer of the PC version below, via IGN.