Shameful copy & paste from Valve's e-mailed press release follows:



Valve and 2K Games today announced an agreement to power all PC versions of the highly anticipated Mafia® II with a host of Steamworks features. All Mafia II players will enjoy the benefits of the Steamworks features included in all PC versions, such as auto-updating, Steam Achievements, statistics, downloadable content, and more.

Customers who pre-order the standard or Digital Deluxe Edition of Mafia II through select digital retailers, including Steam, will be given a free digital copy of the award-winning original Mafia® game that they can access and play now.

"Using Steamworks to power Mafia II has been a great benefit for 2K Games and our development team," said Christoph Hartmann, president of 2K. "It's meant that we can spend more time creating content and a great experience for our customers because we know that Steam and Steamworks are enabling these important features within the game."

"Mafia II is joining Sid Meier's Civilization® V as the next title to use Steamworks from 2K Games," said Gabe Newell, President of Valve. "Our focus for Steam is on building services that create value for our customers and for creators, and Mafia II, with its all-new game engine and inclusion of Steamworks, is a great example of that."

Mafia II is rated M for Mature by the ESRB and will be available in North America on August 24, 2010 and internationally beginning August 27, 2010. For more information visit Steam Games.

And related news is that you'll need a super next gen NASA PC to run the game on uber PhysX/APEX settings:

MINIMUM SYSTEM REQUIREMENTS
Operating System: Microsoft Windows XP (SP2 or later) / Windows Vista / Windows 7
Processor: Pentium D 3Ghz or AMD Athlon 64 X2 3600+ (Dual core) or higher
RAM: 1.5 GB
Video Card: nVidia GeForce 8600 / ATI HD2600 Pro or better
Hard Disc Space: 8 GB
Sound Card: 100% DirectX 9.0c compatible sound card
Peripherals: Keyboard and mouse or Windows compatible gamepad

RECOMMENDED SYSTEM REQUIREMENTS
Operating System: Microsoft Windows XP (SP2 or later) / Windows Vista / Windows 7
Processor: 2.4 GHz Quad Core processor
RAM: 2 GB
Video Card: nVidia GeForce 9800 GTX / ATI Radeon HD 3870 or better
Hard Disc: 10 GB
Sound Card: 100% DirectX 9.0c compliant card
Peripherals: Keyboard and mouse or Windows compatible gamepad

PHSYX & APEX ENHANCEMENTS SYSTEM REQUIREMENTS
Operating System: Microsoft Windows XP (SP2 or later) / Windows Vista / Windows 7 Minimum Processor: 2.4 GHz Quad Core processor
Recommended Processor: 2.66 GHz Core i7-920 RAM: 2 GB
Video Cards and resolution: APEX medium settings

Minimum: NVIDIA GeForce GTX 260 (or better) for Graphics and a dedicated NVIDIA 9800GTX (or better) for PhysX
Recommended: NVIDIA GeForce GTX 470 (or better)
Video Cards and resolution: APEX High settings

Minimum: NVIDIA GeForce GTX 470 (or better) and a dedicated NVIDIA 9800GTX (or better) for PhysX
Recommended: NVIDIA GeForce GTX 480 for Graphics and a dedicated NVIDIA GTX 285 (or better) for PhysX NVIDIA GPU driver: 197.13 or later.
NVIDIA PhysX driver: 10.04.02_9.10.0522. Included and automatically installed with the game.