Laboratory X-19 (also referred to as X-10) is a location featured only in S.T.A.L.K.E.R.: Shadow of Chernobyl.
Lab X-10 is a hidden underground lab where the main components from labs X-18 and X-16 were sent, to construct a large scale Rainbow psychic antenna. It is located directly below the surface complex, accessed via a dead-end railway sidetrack. Behind the Red Forest
The inside of the lab contains up to four Bloodsuckers. After the Brain Scorcher is disabled, dozens of Monolithians set up a perimeter all around the lab. Once the player gets to the surface, Spetsnaz soldiers will already be attacking the base. Duty and Freedom have a skirmish near the road to Pripyat. Loners and Spetsnaz soldiers can be found near the exit to the Army Warehouses. In addition to these new threats, new Monolith squads may appear in places that were previously cleared out.
In earlier builds, most notably Build 1935, X-19 was named "Bunker X-10"; in the final version of the game, this bunker was moved and renamed. In the pre-release version, the entrance to X-10 was somewhere else in the Red Forest. In the Final version the entrance to the area was moved to the Brain Scorcher antenna grounds. Some source files still hold references to the earlier name. Ingame however, the designation X-10 is no longer mentioned. To add to the confusion, X-19 is refered to as lab X-10 in Call of Pripyat.
- ↑ "The documents describe the technical characteristics of the antenna and how they deviate from their planned values. There is a note on the reverse side which indicates that these documents were prepared in lab X10." -Rainbow emitter - main technical characteristics