During the Credits
Posters and signs from the various zones in the game are shown alongside the credits of Prototype 2.
After the Credits
There is a message after the credits that congratulates players for beating the game and informs that the story has been completed and a NEW GAME + on the INSANE difficulty level can be started. Check out more details and spoilers below.
There’s also the option to continue exploring the open world as Heller to get newly unlocked Platinum medals for RADNET events.