Level 29: Outpost Omega: 7 Secrets

Secret 1: In the room with Cacodemons and a Pain Elemental, activate the switch on the far side. A lift will lower. Quickly grab the Armor on the rising platform to its left. Hit the switch on this platform to lower another lift on the opposite side. Ride this lift, which contains a Super Shotgun, to get credit for the secret.

Secret 2: After reaching the Blue Door, enter the room and fall to the lower floors. Examine the computer panel on the second floor down. A lift will drop. Fall to the floor next to the panel, then to the floor below. Grab the Soulsphere before the bars rise. If missed, use the teleporters, reactivate the panel, and try again.

Secret 3: From the Blue Door, drop to the floor below, then to the floor to your left (next to the computer panel). Turn around and run to the platform across the gap. Examine the wall opposite you to reveal a switch. Shoot the switch to create a Laser right in front of you.

Secret 4: From Secret 3, turn right to a platform with an Imp/Hell Knight. Kill the enemy and hit the switch. Turn around and run across two platforms to a lowered lift on your right. Ride it up and shoot the switch on the wall. Drop to the platform below, then run to the platform on your left. A newly raised platform will appear to your right. Walk onto it, kill the Imp, and grab the Backpack.

Secret 5: From Secret 4, run back to the main platform. To your right is another platform with an Imp and a MegaArmor. Kill the Imp. Strafe and run at an angle to reach this platform and grab the MegaArmor. If missed, fall to the lowest floor, use a teleporter, and try again.

Secret 6: From Secret 5, run back to the main platform. Go to the platform with the switch (where you fought the Imp/Hell Knight). Hit the switch, turn around, and run across two platforms to the lowered lift. Ride it up and shoot the switch on the wall again. Drop to the floor below, then run back to the platform across from you. The previously raised platform has lowered, revealing a door. Open it and pick up the Demon Artifact.

Secret 7: Progress to the end of the level. After hitting the two switches to open the exit, kill the appearing Cacodemons and Pain Elementals. Then, hit a third switch to the right of the middle switch. A door will open, revealing a Box of Bullets, a Box of Shotgun Shells, a Box of Rockets, and an Energy Cell.