In Colossorama we slip into the role of a Gladiator and will compete in an arena with others. Controlled is the hero with the "mouse" and "W,A,S,D" also "E" to use the items. In the arena enemies will come in from the left and the right. Dodge there hits and place your own to do damage while not taking it yourself. If you die you have to start all over. After each round you can choose 1 of the upgrades.