Planet Hulk Omnibus (New Edition)

Banished to another planet by those he called his friends, the Hulk faces his most dangerous challenge to date. Captured, enslaved and forced to fight in the gladiatorial contests of the Great Arena at the whim of the planet's merciless ruler, the Red King, the Hulk faces his ultimate challenge - to rise and free an oppressed people or to give in to the monster within and destroy all! 

Collecting Incredible Hulk #92-105 and Planet Hulk: Gladiator Guidebook.