The Ultimate Zombee (also known by various other names, including the boss zombee) is the largest citizen of Andord Hell.
As with all other Andord Hell residents, he is turned into a zombie by the use of zombee taters thrown into Andord Hell by Atlas and P-Body. He then is brought to the main Marrissaverse by Assirram Strebor.
In the boss battle between him and Marrissa Roberts, he is equipped with various weapons, including a rocket launcher and a portal gun. He thus is responsible for Gordon Freeman's death. Originally, he manages to shoot Marrissa's shield, destroying it, but then she runs so fast she appears behind him and hits his brain with a knife, killing him. Witnessing his death, Assirram declares Marrissa a "worthy opponete" and thus they begin their "portal battle".
- ITS MY LIFE! (First appearance)