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The Prototype Pack is on sale for 2 hours only at Amazon as part of their GameSpot Black Friday’spromotion. There’s two versions of the bundle. A Steamworks and a mixed DRM. Mixed means Prototype 2 is Steam activated and Prototype 1 is DRM-free or uses SecuRom. Make sure to pick the one you want.
The bundle comes with:
Prototype 2
Prototype 2: RADNET DLC Pack
Prototype
Thank you for the hint ^^