Go to the Combat Arena and set your health and magic to infinite. Select the Easy difficulty setting and any desired enemies (Cyclops Tyrant and the Minotaurs recommended) in the largest number possible. Use the "Scourge of Erinys" power (at maximum, if possible). Because you have unlimited magic and health, repeatedly press Left to get easy Orbs.
God mode
Successfully complete the game.
Play as zeus/gravedigger in the regular game
Successfully beat the game on EVERY difficulty. Note: You have to beat god mode 3 times.
Special items
Complete the indicated task to find the corresponding item. You can only use the item after the game has been completed.
Aphrodite's Ambrosia (Might of Sparta attack): Complete the sex mini-game in Sparta three times.
Athena's Owl (finds treasures).: After Kratos destroys the Athena statue in a cinematic, search the pile of debris on the right side.
Bonds of Ares (unlimited magic): Enter the Domain of Death through the Death Gate in Atlantis and look in the southern area.
Callisto's Armlet (win context sensitive mini-games).: Immediately after defeating Callisto, search the ground near the battle.
Grave Digger's Shovel (play as Zeus in Arena Combat): Unlock everything in the Temple of Zeus and follow the path that opens.
King's Ring (Collect 10x the amount of red orbs): After King Midas turns the lava into gold, drop down by the area where he touched it.
The Temple of Zeus
Successfully complete the game.
Various costumes
Complete the indicated task to unlock the corresponding costume.
Deimos: Complete the game.
Ghost Of Sparta: Beat the game in God mode.
God Armor: Complete the game.
Legionnaire: Enter unique code provided as pre-order bonus.
Robot : Purchase from the Temple Of Zeus for 70,000 orbs.
Zeus/Gravedigger: Unlock all other bonuses at the Temple of Zeus, solve the puzzle, and use the shovel. Note: Only usable in combat arena.