The PS3 version was highly sought after because it included a full additional game on the same disc:
The was a special retail version primarily released for the PlayStation 3, though it is often confused with the more comprehensive Collector's Edition available across multiple platforms. PlayStation 3 Limited Edition Contents Dead Space 2 Limited Edition
: Includes basic instructions and illustrations for navigating the sequel. Dead Space 2 Collector's Edition (The "Premium" Pack) The PS3 version was highly sought after because
: A redeemable code for exclusive in-game armor and weaponry that provides unique gameplay benefits. Dead Space 2 Limited Edition