Joe Warren was one of the Fireflies stationed at the University of Eastern Colorado. While it is unknown when exactly they took up residence there, the second outbreak must have occurred many years before the events of the game, since Warren had the time to turn into a Bloater. Given his advanced state of infection, it is entirely possible that he was one of the first to be infected there.
Events of The Last of Us Edit
Some time after the second outbreak, Joe's infected form was encountered in the dorms by Joel as he searched the UEC for the Fireflies. He was either avoided or killed by Joel.
- Joe Warren is the name of a real-life person who won the The Last of Us Firefly Pendant Contest, where he got his name on a pendant in the game.
- He is the only infected to drop a collectible.