The Power of the Underworld is the ninth level of Serious Sam 3: BFE.


The Time-Lock requires two Sirian plasma generators to be activated. With the generator below the Temple of Horus online, Sam Stone now needs to make his way into its sister generator beneath the Temple of Anubis.


  1. Near the entrance — around the right of the entrance is a little blocked-off area covered in sand. In the far corner on the right is a secret Medium Health.
  2. On top of a crypt — one of the little pyramid-topped crypts has a health pickup on top (near the second of the locked gates on the left). If you face the entrance to the pyramid shaped crypt, there will be a broken wall directly behind you (note, the wall pictured here is actually from the wall to the left of the crypt, but they are identical and you can scale both walls with the positioning pictured here). If you walk straight up to the wall as shown in this screenshot, you can jump 4 times to make it to the top of the wall — 1, 2, 3, and 4. From there, you can do a running jump to jump to reach the the lower middle ledge of the crypt. Then jump up to grab the Super Health.
    • An alternate way get the health (if you have trouble with the jump) is to melee a Kleer for its skull, scale the broken wall to the left of the crypt exactly as you did in the previous method, then throw the skull exactly as shown, you'll knock the health off of the ledge to the ground where you can pick it up. It takes an exact toss (being off by pixels count), so position your mouse, quicksave, and if you miss, reload, adjust your aim slightly, quicksave again, etc.
  3. In the area with many columns under the level (you can go there by tunnel, or just jumping down) there is a temple with one of the Sirian keys, jump onto the ledge behind the statue to find a Small Armor.
  4. Right before the room with the C-4 box and the hole in the ground where you drop down to the throne room. To the left of the entrance to that room is a pit. Drop down, turn around and crouch through the rubble to find some Electricity.
  5. The throne room — on the arms of the big throne there are some rockets. Go behind the throne and up two levels, jump onto the headrest, then down to gather the ammo (from only one level up with a sprint jump this is also possible).
  6. Outside the crypt — once you get outside in the area with a bunch of columns and ammo you can see a Large Armor on top of a pillar. Blow the pillar up to get the armor.
  7. Before the final fight — before you drop down to the final open area, you climb up some wooden stairs. If you walk along the ledge around the left there are some keys. Pick them up and straight ahead you should see a flashing green pickup on top of a big building. Head back to that point, go through the door, up the ladder, and get the weapon. Reward: Sniper rifle.
    • An alternate path (without the key for the gate) is to jump onto the small sphinx statue, and then sprint jump over the fence.
  8. At the final fight — just left around the corner of the entrance is some Devastator shells.
  9. Again at the final fight — at the far left corner of the area just before the desert is a Medium Health pickup under four spread out palm trees.

Enemy, item and weapon countEdit

Note that it is impossible to get the exact amount of Gnaars, Beheaded Kamikazies, and Cloned Soldiers because of the nature of certain spawners they use. The Antaresian spiders do not appear normally, but they are teleported in by the boss. Also, the Alcor Class Warship can spawn in an infinite amount of certain enemies until it has been destroyed.

EnemiesTourist, Easy and Normal Single PlayerHard, Serious and Mental single playerSerious Difficulty single playerTourist, Easy and Normal Co-opHard and Mental Co-OpSerious Co-Op
Beheaded Rocketeers182182182182182182
Beheaded Kamikazes5656969696
Kleer Skeletons205206206217218218
Cloned Shotgunners6666666
Cloned Riflemen777777
Sirian Werebulls333333
Hatchling Arachnoids171717171717
Adult Arachnoids777777
Witch-Bride of Achrimans444444
Hatchling Antaresian Spiders??????
Juvenile Antaresian Spiders??????
Major Bio-mechanoids888121212
Alcor Class Warships111111
ItemsAll difficulties
Extra Small Healths69
Small Healths20
Medium Healths64
Large Healths6
Super Healths2
Extra Small Armors48
Small Armors28
Medium Armors19
Large Armors9
Ammo Crates (C-4)8
Ammo Crates (Rockets)2
WeaponsAll difficulties
C-4 Demolition Charges4
SBC Cannons2
RAPTOR Sniper Rifles1
AmmunitionAll difficulties
Shell Boxes27
Assault Rifle Bullet boxes30
Devastator Shells10
Minigun Bullet boxes26
Sniper Rifle Bullets1

Related achievementsEdit

Name and Icon Description Notes
Mission completed

Mission completed

Power up the Timelock. (Activate the two generators in Unearthing the Sun and The Power of the Underworld.) -

Gallery Edit