Bug Hunt  -  Kill enough aliens to complete the bonus before returning to MOTHER's chamber.

Come To Mother  -  Destroy all four upgraded battle armor in the room where the main lift is.

Death In The Family  -  At the top of the mansion's stairs, head past the red curtains and take your new trophy.

Escape  -  There is a weapons scientist in a depressed area of the lab. Killing him will fulfil this objective. You may want to do that after using him to unlock the retinal scanner door.

Extinction Event  -  Stay cloaked and head through the first gate to kill the corrupt police chief.

If It Bleeds  -  Disable the cooling fans in order (from one to four).

Maul Upgrade  -  Destroy the large computer at the start of the mission The New Flesh.

Midsummer Night Massacre  -  Kill the Irish gang's boss. He is on the first street and easy to locate.

Night To Remember  -  In the museum courtyard where Borgia's lieutenants are, take out all the window snipers.

No Predator Sounds  -  Use the free camera and moves it down until you can see the Predator from below. If you make any movement (for example, use the War Cry, Voice Mimmicry, or the attack buttons), no sound can be heard. However, if you adjust the free-camera you will hear the sounds again.

Raze The Depot  -  Near where the Predator starts, there are several enemies in an inaccessible room. One of them is the bonus target. Take him out when the chance arises.

Sink The Shipment  -  An entry gate near the shed with the Pulse Mines and Maul has several Les Serviteurs ogling some ex-porn star hookers. Terminate the Serviteur leader (icon over his head). Note that causing any moderate amount of noise or undue attention will cause the enemy to flee from the spot.

Skin Trade  -  Before taking out all the pimps, terminate eight prostitutes by any means.

Under The Gun: Cop Gender Change
On the roof where El Hongo walks down a ramp, go towards the first recharge point. There will be a white marker on your map. On the street will be a cop with a marker on his head. Scan him in tech-vision. For his gender scan, it will be a female.

Unlock Alien Hunter  -  Kill all snipers in the mission A Night to Remember.

Unlock Bad Blood  -  Destroy the large computer at the start of the mission The New Flesh.

Unlock Ritual Armor  -  Destroy the three trucks after following El Hongo. The first truck is by a billboard at the start of the mission. The second truck is in a car park, and the third truck is at the southeast edge of the level.

Wristblades Trace  -  With the Wristblades equipped, stand in front of a wall. Press Light Melee Attack in front of it and quickly move back. A blue trace of the Wristblades will appear, following your arm as you move for a few seconds.