PC owners can purchase Prototype, Prototype 2 and the RADNET DLC all together for just $9.99 as part of the Prototype Pack from Amazon this week.
The online retailer has two different versions of the Prototype Pack available depending on your DRM preferences. The Steam DRM is just what it sounds like; the purchase of both games and the DLC will come with a code to activate on Steam. Meanwhile, the Mixed DRM version of the pack uses SecuROM for Prototype and Steam for Prototype 2 and the RADNET DLC.
For those not familiar with the series, Prototype is an open-world action-adventure game where a virulent plague called "Blacklight" is spreading across Manhattan and turns those it comes into contact with into hideous monsters. Players take on the role of Alex Mercer who is infected but does not completely turn. Instead, he gains shape-shifting powers and is on the hunt to find his lost memories.
Prototype 2 picks up a new protagonist named James Heller who is infected similar to how Mercer was in the original. However, he's out to put a stop to the Blacklight virus and kill Mercer in revenge for the death of his family.