Aliens vs Predator is a first-person shooter developed by Rebellion Developments and published by Sega. In the mission Research Lab for the marine, the player will have to bring Tequila to the surgery room and go through the research lab to reach the elevator to the pyramid.

1. Follow Tequila to the research lab. Kill the android that will wake up and take the stairs to the control room. Wait for Tequila to open the door and follow her.
2. Get inside the elevator. Once downstairs, kill the xenomorph and take cover when the androids arrive. Kil them all with your sniper. Get inside the train and destroy the four other androids who will appear. Two aliens will attack you before you enter the second elevator.
3. Exit the elevator and walk in the hallways. Some of the androids laying on the ground will wake up so check them one by one.
4. Escort Tequila through the lab to the surgery room. After you have put Tequila in the stasis pod, go to Katya and talk to her.
5. After the discussion, exit the room. The xenomorphs are running free in the lab so kill them on the way. You will also have to fight androids. When you exit the surgery room, take the door in front of you on the left. Cross the rooms, kill the two androids and exit. In the hallway, grab the sniper rifle and use the scope to locate your enemies in the dark. There are about five androids in the area waiting for you and two aliens might also attack you. Kill them all and enter the room on your right.
6. Leave the room through the nroken window and enter the queen's chamber. Head to the gate and it will open. Kill the two aliens and take the left path. Follow the objective marker on your radar and enter the control room on the second floor. Kill the two androids on the ground and exit through the opposite door.
7. Two androids will appear from the opposite door. Take cover and use the sniper to easility spot them behind the wall. Kill them and enter the next room. There will be two more androids waiting for you. When the area is clear, proceed to the elevator.
8. Get ready to defend yourself because two androids are in the elevator. Use a grenade when the door opens. Get in and exit to the control room. Interact with the computer to activate the elevator.
9. A door will open. Exit and go outside. Kill the two aliens and step on the elevator. Exit the platform and follow the way to the next room. Kill the three aliens on the way.
10. Follow the path and proceed to the containment room with the elevator to the pyramid. An alien queen will appear. To kill her quickly, take the assault rifle and throw grenades at her. When hit by a grenade, she will fall down and you can shoot her while she is standing up. The four grenades should be enough to defeat her. Be careful with the many aliens around her. If they are too many, retreat and shoot at them.
11. Then, head to the elevator to clear the mission.