OS: Windows XP , Windows Vista, Windows 7, or newer
Processor: 2.6 GHz Dual-Core
Memory: 1 GB (XP), 2GB (Vista/7)
Hard Disk Space: 4 GB
Video Card: 512 MB RAM, ATI Radeon 4850 or higher, NVIDIA GeForce 8800 GT or higher
Sound: Direct Sound Compatible
Steam also says "multiplayer requires microphone headset support," but that isn't true, Namco Bandai tells Eurogamer. Prepare to Die Edition will not support in-game chat at all, it turns out.
The PC version comes with a new expansion, Artorias of the Abyss, which features an untold chapter in the world of Lordran. The expansion will be sold as DLC for PS3 and Xbox 360 versions this winter.