Dremuchij (Operation Snake Eater): Operation Eater

Dremuchij East: Head north into the open area. Look for logs on the western side to find Kerotan 6. Nearby, in the same log area, find GA-KO 6. East of the Kerotan, use your motion detector/sonar to find Frog A (Otton Frog) in a patch of grass. At the base of a tree in the middle of the area, hit a yellow plant for Disinfectant. Look for the Flying Squirrel climbing trees. Northeast of the Kerotan, between two patches of grass along the wall, find a small green bush for a C Med (Cold Medicine).

Dremuchij North: Enter the area and drop off the ledge to find Snake Hs and Frog As in the grass. As the path narrows, shoot or knife down the Snake F (Green Tree Python) hanging from a branch.

Cutscene and Caution: After the scene with The Boss, enemies will appear, initiating a Caution status. To avoid this, immediately run south back to Dremuchij Swampland.

Handling Caution: If you miss the escape, you can try cooking a Stun Grenade and tossing it towards the enemies to stun them for knockouts.

Proceeding North: Once the Caution status is cleared, re-enter Dremuchij North. Continue north to a split path. The eastern path is easier.

CQC Takedown: Stay in the grass on the eastern path. Equip a CQC-viable weapon. Wait for a guard to turn away, sneak up using L1, and perform a CQC slam (press the CQC button and analog in the opposite direction) to knock him out. This may unlock the Mama Said trophy/achievement.

Exit to Dolinovodno: With the guard dealt with, proceed north to the exit to Dolinovodno.