Stalker 2: For Science! Side Quest Walkthrough

In Stalker 2: Heart of Chornobyl, players can embark on the "For Science!" side quest, unlocking access to the STC Malachite facility. This quest begins with an encounter with Yaryk Mongoose at the Central Elevator in the Chemical Plant.

Initiating the "For Science!" Quest:

Locate Yaryk Mongoose within the Central Elevator area. He'll contact Skif via radio, prompting a meeting. Navigate past conveyor belts, ascend the rusted stairs, and vault the railing to reach him. Mongoose will explain the need to activate a second measuring device atop a silo, initiating the quest upon acceptance.

Reaching the Silo's Summit:

Ascend the building's stairs to the roof. Eliminate any rodents encountered. Climb through a broken window and descend the external ladder to the silo walkways. Equip a bolt-action weapon to counter electro anomalies. Proceed along the silo's top to activate the second device. Activating the device will attract Bloodsuckers. Choose to fight or evade them.

Confronting Yaryk Mongoose:

Return to Mongoose. He'll explain the experiment's unintended consequences. Players can choose to kill Mongoose or accept the reward peacefully. Both choices yield the Malachite pass, granting access to the STC Malachite base (unless already accessible via main missions). Choosing the peaceful option also provides additional coupons.