Note: Skins are purely cosmetic. Playing as Alex Mercer will not give you Mercer’s specific move set from the first game; you will still use Heller’s tendrils and powers. Quick Unlock Summary Table Method of Unlock Complete all Radnet Challenges Zombie Heller DLC / Pre-order Bonus Test Subject Heller Colossal Mayhem DLC Infested Heller Radnet Rewards Viral Infector Excessive Force DLC
While not "player skins" in the traditional menu sense, certain unique NPC disguises are missable during the campaign: Special Military Disguises: Prototype 2 Unlock All Skins
: Complete all 5 sets of RADNET events (challenges and missions) to unlock the ultimate reward: the Alex Mercer Skin . Note: Skins are purely cosmetic