6) Laboratory X8

Head to the Yubileiny Service Centre. The building contains zombies and monolith fighters (26 total will show on the minimap (a small map displayed on your HUD (heads-up display — the on-screen icons showing health, ammo and the minimap))).

Clear the ground floor and first floor of 13 zombies.

Eliminate the 4 monolith soldiers on the second floor.

Defeat the 1 zombie and 4 monolith soldiers on the third floor.

Clear the 4 monolith soldiers on the fourth floor.

Locate the body of mercenary Barchuk near the lift shaft. Take his PDA, which contains information about a generator on the sixth floor (which is actually the floor above the lift shaft, as the building technically only has 5 floors).

Activate the generator by interacting with it. This will allow you to use the lift.

A snowflake artefact can be found on the roof within electrical anomalies.

Return to the ground floor and use the lift to descend to the basement. The mission will update to instruct you to find documents.

Exit the lift and proceed down the stairs. Use the keypad to open the door. Inside, you can find up to 4 documents.

Kill the poltergeist first: Go across and down the stairs (marked 1 on the map). Go up the stairs marked (4), then up the ladder marked (5). Kill the electrical poltergeist inside. Grab the machine gun located there. Return to the start, killing any 'hamsters' (small creatures) that appear in the room below on your way back.

Document 1: "A notebook with a description of an experiment": Exit the basement area and go down the first hallway on the left. Open the lockers at the end for a first aid kit and some ammo. Proceed through a door that contains a roaming electrical anomaly. Head down the stairs and retrieve "a notebook with a description of an experiment" (weighs 0.02KG). This action will update the mission to find more documents or exit.

Document 2: "Rainbow Emitter - Main Technical Characteristics": Return to the starting point of the basement area. Head down the stairs marked (1) on the map, then go down the stairs marked (3). Navigate this area carefully due to numerous anomalies; use your detector to avoid them. Follow the hallway into a large square room. Drop into the water-filled section, kill any 'hamsters' that appear, and then grab the document "Rainbow Emitter - Main Technical Characteristics". Additional ammo, first aid, and an antidote can be found in the room's corner.

Document 3: "Order Of Transfer": From the room containing the rainbow emitter document, exit through the door leading east. Go down the stairs marked (6) in the next room. The documents are located on a control panel in the southwest corner. A first aid kit is available underneath.

Document 4: "Research Documents": After collecting the "Order Of Transfer", head back up the stairs. Ascend the stairs marked (7) and (8). Navigate through the room, eliminating any snorks (mutant creatures) that appear. Proceed up stairs (9) and along the walkway into a large room. Retrieve the "research documents" from the table at the back. A burer (mutant creature) will enter the room; defeat it. Before exiting, attack the cupboard with your knife to open it and obtain some ammo.

Make your way back to the entrance.