This article contains spoilers. Read at your own risk!
"All my readings are going wild and I have the sense that something BIG is going to happen, but I'm not sure what exactly. I have detected slight ground tremors, maybe a minor earthquake."
―NETRICSA to Sam, foreshadowing the events that are yet to happen[src]
Sam has finally reached the Great Pyramid. He must clear his way to the pyramid, get inside, and get beamed up by the Sirian spaceship, the SSS Centerprice. But, there is an unexpected surprise waiting for him: Ugh-Zan III. After killing him, Sam gets beamed up on the spaceship, gives a phone call to Mental, taunting him that he's coming to kill him, but it turns out that Mental is not at home right now so he leaves him a voice message, and departs to Sirius.
Secrets[]
(Serious Sam HD only) in the arena, from the middle tunnel on the left, after the Major Bio-mechanoid bursts through it, enter it to find a Large Health. You don't need to do this the moment they burst through the tunnels, but it's suggested you do it after all the fights in the arena are complete.
(Serious Sam HD only) opposite of #1, there's an Extra Small Armor. Pick it up to register a "surprise secret". This will cause 8 Minor Bio-mechanoids to spawn behind you, 2 groups of 4 at a time.
(Serious Sam HD only) when approaching the pyramid, look to your right, far in the desert. You'll see an Aztec head. There's an Extra Large Health near it, but collecting it will spawn a large number of Beheaded Kamikazes.
Related achievements[]
Serious Sam HD: The First Encounter[]
Co-op Hippy
10
Complete The Great Pyramid in co-op with blood option set to hippy.
Serious Sam Classics: Revolution[]
The Good, the Bad and the Enormous
Finish The First Encounter in single player.
Friendly First Encounter
Finish The First Encounter in cooperative.
I am Ugh-Zan
In singleplayer, beat the last level of The First Encounter or the last level in The Second Encounter in the "I am Ugh-Zan" difficulty.
Serious Sam VR: The First Encounter[]
Hey! That's Cheating!
Trigger Ugh-Zan's regeneration on The Great Pyramid.
Serious Sam Fusion[]
Hey! That's cheating!
Trigger Ugh-Zan's regeneration on The Great Pyramid.
Trivia[]
There is a clock above the pyramid's entrance counting down in binary.
Incident at the Arena·Senator Cicero's Villa·The Senator's Vineyards·Praetorian Camp (lost level) ·Via Aurelia·Opening the Aurelian Gates·The Forum Romanum (lost level) ·Temple of Neptune·The Forum of Trajan (lost level) ·Through the Servian Gates·Temple of Mars·Addressing the Senate (lost level) ·Emperor's Gardens·Caesar's Sanctum (lost level) ·Caesar's Palace·Touts at the Colosseum·Under the Colosseum·Showdown at the Arena·Splashdown in Xifengkou·The Monkeys of Juyongguan·Jiayuguan Fortress·The Silk Road (lost level) ·Dunhuang Oasis·Magao Caves·Cave of the Wickermen·The Gate of Supreme Harmony (lost level) ·The Three Halls of Harmony·Yuhuayuan - Imperial Garden·The Beast Beneath the Palace·A Chilly Reception·The Steam Tower (lost level) ·Temple of Steam·The Deep City·The Geothermal Tunnels (lost level) ·The Guardian Gates·Hall of Translation·The Tower of Confusion·Hall of Transposition·The Corridors of Power (lost level) ·Ascending the Throne·Sirian Mothership·Engine Core Critical·Gallery (lost level)