S.T.A.L.K.E.R. 2: Heart of Chornobyl received the free content update 'Sealed Truth' on Apr 14, 2026. GSC Game World's update notes say the release is centered on a new questline that begins when players talk to Diode, adding fresh story content rather than another small bug-fix-only pass.

What is in the update

The new questline is the headline feature, but the patch also makes a few practical changes that matter for active players. The notes say the content becomes available after finishing the story quest 'Hot on the Trail' and before starting 'A Minor Incident', which narrows the progression window and tells returning players exactly where the new material fits.

Update name: Sealed Truth
Release date: Apr 14, 2026
Main addition: new questline starting with Diode
Key fixes: strong-mutant overpopulation in long campaigns, 'Dark as a Dungeon' cancellation bug
Extra change: new loading screens

The bug fixes are not filler. Overpopulation of stronger mutant types can distort pacing and difficulty in long sessions, so correcting that affects the game beyond a single mission. The same goes for the 'Dark as a Dungeon' issue, where the mission could cancel immediately if the player had already reached the point of no return. That is the sort of progression bug that can turn a story run into a dead end, which is why even one-line fix notes carry weight in a game this large.

The other important note is the mod warning. GSC says mods may not survive the latest update structure and recommends disabling them if players run into performance or stability issues after installing Sealed Truth. That is routine language for a heavily modded PC game, but it is still a useful signal for anyone returning to a customized save.

At check time, the Steam page still listed S.T.A.L.K.E.R. 2 with a Mostly Positive user rating, with 41,467 reviews in English at 77% positive. That context matters because Sealed Truth is arriving in the live-service style cadence players now expect: new quest content, progression fixes, and clear warnings for modded setups rather than a vague promise of future improvements. The Reddit thread treated the update as a meaningful content beat, and the official notes back that up. This was not just maintenance. It was a new story slice with targeted cleanup attached.

#gsc game world

S.T.A.L.K.E.R. 2 Adds 'Sealed Truth' Questline in Apr. 14 Free Update