Getting to the Red Key Slot (5)

Return to the circular room and locate the Red Key slot.

Use the Red Key in the slot to open the door and lower the ramp.

Proceed up the ramp. You will find Devastator Ammo to the left and right.

Prepare to fight three Battlelords. The Devastator and RPG are recommended, with plenty of Devastator ammo available.

Alternatively, use Steroids to rush in and out if you wish to avoid fighting them.

After clearing the Battlelords, collect two Chaingun Cannon Ammo behind a support and a Large Medikit on the floor.

Obtain the Blue Key located at the other end of the room to progress.

To find SECRET 4, go to the back end of the room and interact with the computer monitors. Either jump into the upper left computer or search the lower right computer to reveal a secret door containing two Laser Tripbombs and an Atomic Health.

Proceed to the Inner Complex. You will encounter an Enforcer upon entry.

Inside, raised walls will conceal three Enforcers, and another Enforcer will attack from the doorway you did not enter from. A Portable Medikit is on the ground.

Hit the switch near the monitor to open the door opposite the cavern, leading to the conveyor room.

Enter the conveyor room and go up one of the rampways. You will be attacked by an Enforcer initially.

Continue up the rampways, encountering more Enforcers, Devastator Ammo, and a Large Medikit.

Near a computer, find a Large Medikit and a switch. Hit this switch to open the wall across from you and raise some platforms.

Two Battlelords will attack; use your Devastator wisely. It is possible to defeat all Battlelords in this level.

Cross the platforms and hit the switch at the end to open a wall leading to the exit.

To find the SECRET LEVEL, face the exit from the platforms, turn left, and look up. Shoot the switch on the wall. A door will open to your right, containing a secret Exit Symbol that leads to E2L10, Spin Cycle.