Unlockables
Art Gallery:
get a bronze rank on all normal events

Chameleon suit:
buy all items from all vendors

Chariots of Ire:
gold in all Hard gladitorial events

Crew Cut:
given from start

Fortus Rex Amor:
collect a total of 300,000 salvos

Gorilla Costume for Agrippa:
complete all gladiator challenges

Great Escape Minigame:
get a gold rank on all normal events

Invisible Opponents:
get bronze in all Extreme gladitorial events. They will be invisible when ON is selected

Labyrinth Arena:
get a silver rank on all normal events

Mr. Onion Head:
buy at least 5 items

Pansas Robe:
buy at least 10 items

Splitting Head Ache:
buy at least 20 items

Survival Mode:
get a silver rank on all normal events

Talon Aegis:
collect a total of 800,000 salvos

Ugly Duck Fling Minigame:
get a bronze rank on all hard events

Vitality Opponent Gauge:
get bronze in all Extreme gladitorial events. Its visible if ON is selected.

Hint Weapons Cache
In the Syracuse prison 2nd floor, there are two wooden crates that contains a two-handed weapon, as well as a one handed weapon. These are only there when you play as Agrippa when you are exiting the prison. The boxes are in a hole on the rock side of the pathway.