Predator: Concrete Jungle

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

Destroy all four upgraded battle armor in the room where the main lift is.

Locate and open two explosive crates. One is near where the Predator starts the mission, on a rooftop. The second is in a parking lot near where the weapons van is crashed.

At the top of the mansion's stairs, head past the red curtains and take your new trophy.

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