Quake II/Upper Mines

Level objective
The objective for this level is to activate the mine machinery to gain access to the Drilling Area.

Immediately upon arriving you find yourself standing in toxic liquid, taking damage. The door opens, but the path ahead is barred. You can choose to take out the enemies beyond the bars now, or simply back up and let the door close. Notice that the door bears a red "EXIT" sign; it may be the way out of the Mines unit, but first you would need to find a way to retract the bars and make the passage across the toxic pool safe. Turn around and head to the door at the opposite end of the short tunnel segment to gain access to this level of the mine.

As soon as the second door opens, you can collect a Grenade Launcher.

(Expand this section)

Secrets
This level has two (2) secrets:
 * 1) Just before the floor button that activates the bridge is a dark wall panel with a strange backglow. Shoot it to reveal health and ammo.
 * 2) Watch for a control panel that is malfunctioning and emitting sparks.  Shoot at with the Blaster until it explodes and collect a Quad Damage.