STALKER 2 Sealed Truth feature
Patches

STALKER 2 Sealed Truth Update Drops Today – Full Details Revealed

2 Comments

GSC GameWorld has announced that the Sealed Truth Update for STALKER 2: Heart of Chornobyl will be released today. Moreover, the devs have shared the full patch notes, so let’s see what this new update brings to the table.

The Sealed Truth Update delivers a new narrative-driven activity centered around the mysterious X-Lab. It will expand the Zone with fresh story content and high-risk opportunities, available free for every owner of the game. Players can expect a high-risk, high-reward excursion filled with mystery, danger, and unknown consequences.

This update serves as a complementary update in celebration of the upcoming Cost of Hope DLC announcement, and is meant as a thank-you to the community for staying with the Zone.

For those wondering, no. This patch will not upgrade the game to Unreal Engine 5.5 or 5.6. This is something that the devs promised to do back in August 2025. However, there is still no ETA for when this will happen.

It’s also worth noting that this new update fixes an issue causing overpopulation of strong mutant types in long campaigns. It also fixes an issue where the mission ‘Dark as a Dungeon’ would immediately cancel if the player had already reached the point of no return. Plus, it adds some new loading screens.

Like always, Steam will download this update once it becomes available later today. Below, you can also find its full patch notes.

STALKER 2 Sealed Truth Patch Release Notes

  • Explore a new questline that starts when you talk to Diode.

  • Fixed an issue causing overpopulation of strong mutant types in long campaigns.

  • Fixed an issue where the mission ‘Dark as a Dungeon’ would immediately cancel if the player had already reached the point of no return.

  • Added new loading screens.

Explore the X-Lab

Deep beneath the Zone, places like X-Labs remain sealed behind massive doors or buried under the consequences of failed “research.” Rumors are now spreading among stalkers that Diod, a technician from Slag Heap, has somehow gained access to the lower levels of X-18.

No one knows what is really happening down there. This is your chance to find out.

Risky Gig with High Reward

Diod isn’t interested in loot — only in something he desperately needs. And it just so happens that Skif might be the only one capable of getting him inside.

On paper, it sounds like a simple deal: access to the lab in exchange for a hefty payout. But nothing in the Zone is ever simple.

Expect a high-risk, high-reward excursion filled with mystery, danger, and unknown consequences. Aside from the payment, more may await — lost knowledge, useful gear, or something far more significant hidden deep within the lab.

New Context in the Zone

This content drop expands the world of S.T.A.L.K.E.R. 2: Heart of Chornobyl with a focused but meaningful story encounter tied to the deeper mysteries of the X-Labs.

It serves as a complimentary update in celebration of the upcoming Cost of Hope DLC announcement, and is meant as a thank-you to the community for staying with the Zone.