Basic Training - Press every button in the end briefing room
The Drop - Kill the courier
The Push - Man the pintle gun and kill the 4 guards activated
Watch Towers - Kill all the snipers on the upper ring of the prison
The Cells - Free all the tau prisoners
Deep Level - Pick up the bread in the caves
Unwelcome Guests - Save the air caste in the kitchen from being killed
The Invaders - Save the air caste in the medical bay
System shutdown - Kill the 3 tech priests by the keys
Diversion - Find the 3 hiding air cast on the bridge deck
Clear the Decks - Shoot a barrel on a ledge on Deck B
Power House - Do not set off the sentry alarms
Distant Eyes - Kill the 4 snipers running on a ledge by the orange door
No Rest/Wicked - Shoot the barrels in the sewer
Silence the Guns - Kill the scared servitor in the engine room
Last Chance - Kill the 3 imperials you find as you jump down the stairs
City in Tatters - Kill both obliterators
Titanic - Shoot an enemy on the upper balcony from the middle balcony
Descent - Find the meltagun
Convergence - Find the 3 dead tau
Face of Chaos - Shoot the 4 chaos candelabra