Mag Agent: N is a Nexus version of the Mag Agent and the final boss of Episode 1 of Madness: Project Nexus.

Mag Agent: N can fire bullets that penetrate the player's TAC-Bar. In order to defeat him, Hank, Sanford and Deimos must damage him as much as possible until N falls to the floor.

Upon falling to the floor, N's second phase begins. The Mag Agent will still try to shoot at Hank, Sanford and Deimos, but with less accuracy. He will also be unable to move around, making it is easier to attack him. When he is defeated, N falls to the floor and dies, concluding the first episode.