Private First Class Joseph Allen is a playable character and the main protagonist in the early part of Call of Duty: Modern Warfare 2. He is introduced in "S.S.D.D." helping Sergeant Foley train local Afghan resistance fighters at Firebase Phoenix in Afghanistan. He then undergoes a selection phase for Task Force 141 prior to engaging local OpFor troops. He is then hand-picked by Shepherd to go undercover in Vladimir Makarov's cell under the alias Alexei Borodin.
Allen is killed by Vladimir Makarov when attempting to escape from Zakhaev International Airport, having learned about his real identity. He becomes the victim of a conflict of goals between General Shepherd and Makarov. It is interesting to note that his voice is heard later on in the game after he has been picked for Task Force 141, making him the one of the fewCall of Duty playable characters to be heard (another example of which is the Thermal Imaging TV Operator in Call of Duty 4: Modern Warfare). Before joining the Rangers, he lived in Ithaca, NY.