It is important to distinguish between versions, as they are often confused in second-hand markets:

: On the PS3, the full version of Extraction is included directly on the Dead Space 2 Limited Edition game disc.

: You do not typically need a separate download code; instead, you navigate to the "Bonus Content" icon under the Dead Space 2 icon on the PlayStation XMB (system menu) to install it directly from the disc to your hard drive.

While the PlayStation Store (US) has historically offered Extraction as a standalone purchase, the most reliable legal way to obtain it now is by purchasing a physical copy of Dead Space 2 Limited Edition from retailers or marketplaces like eBay. Dead Space 2 [Limited Edition] : Video Games - Amazon.com

: You must keep the Dead Space 2 disc in the console to play the installed version of Extraction . Standard vs. Limited Edition

: Includes the full HD remake of Extraction with Trophy support and co-op.