Create a new species

Wipe out all of the Marines in the Colony

Retrieve the second artifact

Defeat the Matriarch

Survive trial by combat

Kill two enemies with one throw of the Battle Disc

Find the Youngbloods in the Jungle

Escape from C-Block

Escape from the Research Lab

Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'.

Acquire Cronos' Rage

Acquire Rage of the Titans

Acquire Typhon's Bane