Stalker 2: For Science! Side Quest Walkthrough

In Stalker 2: Heart of Chornobyl, players exploring The Zone will encounter various NPCs, leading to quests ranging from minor tasks to substantial side missions like "For Science!". This mission involves Skif meeting Yaryk Mongoose, who needs help activating a second measuring device atop a silo. While relatively short, completing it rewards players with a Malachite pass, granting access to the STC Malachite facilities.

Initiating the "For Science!" Side Quest

To begin, find Yaryk Mongoose in the Central Elevator area of the Chemical Plant. Upon approaching, you'll hear Mongoose radio Skif, requesting a meeting. Inside the Central Elevator, go left past the conveyor belts, ascend the rusted stairs, vault the railing, and speak with Mongoose. He'll explain the need to activate a second device on a nearby silo. Agreeing to his request starts the "For Science!" mission.

Reaching the Silo's Summit

Exit the room and climb to the building's roof. Eliminate any rodents encountered. A room with broken windows provides access to an external walkway and ladder leading to the silos. Equip your bolt-action weapon; electro anomalies await. Proceed left along the silo's top to activate the measuring device.

Activating the device triggers a Bloodsucker attack. Choose to fight or evade them to reach Mongoose.

Confronting Yaryk Mongoose

Upon confronting Mongoose, he'll explain the experiment's unintended consequences. Players can choose to kill Mongoose for endangering Skif or accept the reward and leave. Neither choice significantly impacts the game's progression. Killing Mongoose allows looting the Malachite pass from his corpse; choosing the peaceful option rewards the pass and some coupons. The pass grants access to the STC Malachite base (unless already accessible through main missions).