Kostya's stash, X-10

== Walkthrough ==
This stash is protected by three controllers, several bloodsuckers, and a teleport puzzle which you have to solve. Head into the lab to get teleported back and to start the puzzle. The solution is on the video below.
At the end of the puzzle, you will reach the stash with the PDA, a note on which says that the code is 2...9...7; after taking the stash, you'll be teleported to another part of the lab, and a couple bloodsuckers will spawn around.
The numbers are constant parts of the code, and the dots are unknown parts. You have to rearrange numbers Kostya got in the previous stash (9, 7, 2, 54, 61) in such a way that they fit into this. There are only two possible ways to do this, either 2 54 9 61 7 or 2 61 9 54 7. The code unlocks the door nearby (2:17 in the video). You can try both combinations on the door to find the right one.
The backpack behind the door contains two kinds of teleporting devices, and an instruction for one of them, which will be stored as a note in your PDA.
=== Teleporter ===
The Teleporter is a device that can teleport you to certain locations at will. It doesn't do anything on its own; it's just a convenient interface for "manual teleports" you obtain throughout the game; see for example Bonus stash: Yantar on how to obtain the manual teleport to Yantar. Each use requires a Teleport artifact in your inventory, and consumes it. Teleport artifacts can be purchased from merchants, Doctor in particular.
=== Hand teleport ===
The Hand Teleport Prototype is a single-use device that transports you into a random location, consuming a Moonlight artifact from your inventory in the process.
=== Backup stash at Dump ===
The instruction manual for the Hand teleport prototype mentions some cryptic "backup stash" at Dump, and says that you can only get to this stash from the swamp at Dump. Refer to the video above to the location of the stash, the timecode is 2:57. The stash contains another two prototypes.
=== Kostya ===
Report to Kostya and show both devices to him. He will advise to check Sakharov out; maybe he knows how to use the "random" teleport prototype. (this leads to Vasiliev's PDA)
== Notes ==
* Wiping the lab before accepting this quest will make your life much easier.
== Bugs ==