Hired a staff member

Deployed Vocal Overdrive 4 times in a single song

Successfully entertain Aphrodite

Open the Gates of Tisiphone

Kill the Poseidon Princess

In any one-player mode, with any pitcher, strike out the side using the same pitch for each "out" pitch.

Kill Helios

Kill Hades

Discover the secret 'Hades Arm' room

Acquire the Bow of Apollo

Kill Poseidon

Nathaniel - Do not shoot Nathaniel