An Invisible Threat: Stalker 2 Quest Walkthrough

When Skif in S.T.A.L.K.E.R. 2: Heart of Chornobyl obtained the emitter and saved Professor Lodochka, Richter contacted him. The stalker knows where Scar is now. He asks to give the device to him. On the way, you can complete the "Hornets' Nest" quest.

Scar is on the other side of the "Rostok" base. There, you can finally upgrade your equipment, so don't neglect visiting traders and the engineer. Once you reach Scar, talk to him and listen to the plan.

You will have a battle with "Varta" near the "Arc." After the dialogue, the quest will end.