Aliens: Colonial Marines - All Collectables Guide (Level 6) Videos

Dog Tag:
1. At the start of the level, move fowards until you get to the cliff area where you need to turn right. It's on the floor there.
2. At the start of the level follow the route around. It'll be on the left along the path, on top of a yellow box.
3. In the computer room on top of the computer. "Escape to the elevator with Bella and O'Neal"

Audio Log

1. The screen will shake as you are climbing down a metal wreckage. It's behind you as you drop down, along a ledge.
2. When you reach the first turret, it's in the room with it. Take the turning left to get behind the turret and the Audio Log is in front of you.
3. Around the corner to the next turrets, there is one that is covering a long corridor. You can either turn left and hope it doesn't kill you or walk straight on, go through the air vent and disable the turret, then walk straight down the corridor to a room with the Audio Log in.

Vasquez's Smart Gun:
It's after the last Dog Tag that you find. You'll go outside for a bit to kill some enemies and eventually go back inside a building. As you go down the stairs and through a door, the Smart Gun is on top of some pallets in the left corner, directly infront of the door.