Quick Links
In S.T.A.L.K.E.R. 2: Heart of Chornobyl, players face numerous pivotal choices that significantly impact their journey. These decisions can alter the game's narrative, leading to different main missions. For instance, the mission "Just Like the Good Old Days" begins after completing either "To the Last Drop of Blood" or "Law and Order," both culminating in an escape from SIRCAA.
Talk to Professor Lodochka at Wild Island in S.T.A.L.K.E.R. 2

To start, players must navigate to the mission marker on Wild Island, where they will encounter Professor Lodochka at Quite’s Camp. Upon arrival, a new priority objective emerges: to eliminate a group of mercenaries in the area. These foes are clearly marked, eliminating the need for players to search for hidden threats. Equipping suitable gear is advisable, as this won't be the only combat encounter during the mission. After dispatching the mercenaries, follow the single mission marker to reach Lodochka. At this point, an optional objective becomes available: to activate the Ventilation System.
Activate the Ventilation System

For those opting to tackle this side objective, consult your map to locate the marked points. One such point will guide you to a fuse nearby. After securing the fuse, the map will reveal a new marker to the north, directing you to the engineering rooms. Be prepared to confront an invisible enemy in this area. Navigate through the shelter's passageways to reach the Engine Room, where you can use the fuse to restore power to the Ventilation System. Completing this task doesn't grant any special rewards but simplifies the rest of the mission.
Find the Source of the Signal in S.T.A.L.K.E.R. 2
Before proceeding to the next objective, it's wise to arm yourself with robust weapons, as the challenges ahead are formidable. Follow the marked location to a cave entrance by the waterside. Traverse the caverns heading west, descend further, and navigate through various obstacles. You'll encounter a broken pipe that can be used to access higher levels of the cave.
Upon reaching the designated area, you'll find a large cone-shaped spire. Locate the Emitter at the marked point adjacent to this structure. Be ready to face another invisible enemy on your way out. Once you've secured the Emitter, return to Lodochka and engage in conversation with him to conclude the mission. The next main mission, "Hornet's Nest," will then become available.