Caves, Sniper Wolf & The PSG-1

Descending through the hidden passage behind Mantis's bookshelf brings you into a pitch-black natural limestone cave system:

• Night Vision Goggles: Equip your NVG to illuminate the jagged rock pathways.
• Wild Wolf-Dog Pack: Snake refuses to kill the animals; throw Stun Grenades to safely flashbang the wolf-dogs and run through without using lethal ammunition.
• Supplies: Check the corners of the caverns to recover three rations, ammo, and Diazepam packs.

Follow Meryl as she crawls through the low rocky passage on the right to emerge onto the snowy canyon.

Exiting the cave leads onto an open snow canyon heavily laced with radar-jammed Claymore mines:

• Follow Meryl's Footsteps: Crawl prone exactly along the path traced by Meryl's footsteps in the snow to safely pick up and disarm the Claymore mines.
• Near the canyon exit, a high-caliber sniper round strikes Meryl in the abdomen, dropping her into the snow.
• A second shot hits her leg, pinning her down. The Codec chimes: Sniper Wolf is using a wounded Meryl as living bait to lure Snake out of cover.

To engage Sniper Wolf on equal terms, you must backtrack to retrieve a high-powered precision marksman rifle:

1. Cross back through the wolf caverns using Stun Grenades.
2. Pass through Mantis's quarters and the nuclear storage area to the elevator.
3. Ride down to Tank Hangar Basement B2.
4. Unlock the armory room marked with the "PSG-1" sign (requires Level 5 Keycard).
5. Light a cigarette to expose the infrared laser tripwires, crawl underneath them, and collect the PSG-1 Sniper Rifle along with two boxes of 7.62mm ammo.

Return to the snowy canyon where Meryl was pinned to begin the extreme-range sniper duel.

Landing several clean shots forces Wolf to withdraw into the complex. Upon reaching the northern corridor, Meryl is gone, and Snake is ambushed from behind by Genome Soldiers and knocked unconscious.