An Assassin is a tribeless contract killer in the Tribes Universe. They have no honor while fighting and do not fear fighting dirty. They have a code: An assassin must complete the job or die trying to.
The Assassin skin is available for the Infiltrator class and was one of the two first skins released in the Cloak and Dagger update. The skin features a changed Jetpack coloration changing it to red and changing the melee to a punch.