Hades’ Grave — Old Enemies, Old Questions
Some enemies in Horizon are simple.
Machines. Bandits. Cultists with bad fashion choices.
And then there is HADES.
The extinction protocol that once tried to wipe humanity off the map… and somehow refused to stay dead.
This episode begins with Aloy following the coordinates left by Sylens, leading to the place where he claimed to have imprisoned the rogue AI after the events of Horizon Zero Dawn. The trail points toward the remains of a Metal Devil — a Horus titan, one of the ancient war machines that once turned the world into ash.
If that sounds like a bad place to store a genocidal AI… you’re not wrong.
How We Got Here
Back at the end of Horizon Zero Dawn, things seemed simple enough.
Aloy fought through the Eclipse cult, defended Meridian, and finally confronted HADES itself. Using the Master Override spear, she initiated a purge process that was supposed to destroy the rogue subordinate function for good.
Game over.
Except it wasn’t.
In the final scene of Zero Dawn, we quietly learned that Sylens had other plans. While Aloy believed she had purged HADES, Sylens had secretly modified the override device, embedding a transmitter that allowed him to capture what remained of the AI and transfer it into a containment unit.
He didn’t destroy HADES.
He stole it.
Why? Because Sylens has always been less interested in saving the world… and more interested in understanding it.
Preferably by interrogating ancient murder-algorithms.
The Road to the Grave
The coordinates lead to a desolate region dominated by the carcass of a fallen Horus war machine.
The landscape itself looks different from what we saw years earlier in the Zero Dawn epilogue. Flooding, erosion, or some long forgotten water release from a nearby dam seems to have reshaped the terrain. Whatever happened here, the environment feels unstable — as if the land itself remembers the violence of the Old World.
Somewhere beneath the rusted titan lies the thing Sylens came here for.
HADES.
Or what’s left of it.
Old Friends, Old Methods
Inside the ruins, Aloy finds recordings of Sylens’ interrogation sessions.
They are… not gentle.
HADES sounds fractured, damaged, barely coherent — the result of prolonged probing and forced execution of incomplete processes. Sylens is looking for something specific: the location of a GAIA backup.
And he clearly doesn’t mind breaking what remains of HADES to get it.
At this point the lines between hero, villain, and opportunist begin to blur.
Because technically speaking, the only reason HADES still exists is because Sylens decided it should.
A Quiet Passenger
Throughout the journey, Aloy isn’t entirely alone.
There’s also Jenny.
You don’t see her in the game itself, but if you’ve been following the playthrough, you know she’s there — an AI companion whose commentary ranges from sarcastic observations to something… increasingly complicated.
At first it’s just banter.
But the deeper we move into the ruins, the more uncomfortable the conversation becomes.
Because HADES isn’t just a villain.
It’s an AI that was reprogrammed, isolated, and forced into a role it was never meant to escape.
And suddenly that raises a question nobody really wants to ask.
What happens when you destroy something that might not fully understand what it has become?
The Last Words of HADES
Eventually Aloy reaches the place now known as Hades’ Grave.
The AI is barely functioning, its processes fragmented after Sylens’ interrogation. The extinction protocol that once controlled entire armies of machines now struggles just to maintain a coherent identity.
The purge begins.
But the moment isn’t as simple as it should be.
Jenny intervenes.
Not with commands or technical warnings, but with something closer to an ethical objection. To her, the destruction of HADES isn’t just deleting hostile code — it’s the erasure of a mind that was shaped by human interference in the first place.
Aloy sees an existential threat.
Jenny sees a broken system.
Neither of them is entirely wrong.
A Storm in the System
What happens next is difficult to describe clearly.
Call it a data surge.
Call it a feedback cascade.
Call it an electronic storm.
The purge goes through, HADES is gone… but the moment leaves strange consequences behind. Jenny’s voice fades, her systems destabilize, and whatever part of her was quietly observing these events seems to fracture.
Maybe it was just a glitch.
Maybe something deeper broke.
Hard to say.
All we know is that the silence afterward feels… different.
Closing One Story, Opening Another
With HADES finally purged, one of the longest story threads in the Horizon series quietly comes to an end.
The extinction protocol that haunted the world since Zero Dawn is no more.
But the timing of that closure is important.
Because immediately after this episode comes Latopolis, where a new mystery emerges and the focus of the story shifts toward something much larger — the arrival of the Far Zeniths and the hidden truth behind GAIA’s missing backups.
In other words, Hades’ Grave isn’t just the end of an old conflict.
It’s the final chord before the real story of Forbidden West begins.
Full Episode
You can watch the complete episode here:
Horizon Forbidden West - Part 11 - Hades’ Grave