Found the secret reptile

Use the Oath Stone of Orkos in Combat 10 Times

Collect all of the Phoenix Feathers

Treat the Martyr of Hecatonchires poorly

Defeat Pollux

Breathe the toxic gases within the Oracle's Temple

Ride the snake back to the Tower of Delphi

Solve the Rolling Crusher Puzzle

Defeat Megaera and the Titan Hecatonchires

Kill 25 Enemies using the Rage of the Gods

Defeat the infected Hand of Aegaeon

Without dying, got a kill with a Carbine, Pistol and Rocket Launcher

Won a round in Conquest Domination