Location: Umbrella Research Facility (Mission 1: Containment)
G-Birkin's first form is a grotesque, mutated human with a massive, clawed arm. He is relatively slow but hits incredibly hard. This fight takes place in a confined lab area.

- Phases: One primary phase.
- Attacks:
- Claw Swipe: A wide, powerful melee attack.
- Ground Slam: Jumps and slams his claw, creating a small shockwave.
- Charge: Charges directly at a target, knocking them down.
- Weakness: The large, exposed eyeball on his right shoulder/arm. This is his primary weak point.
- Strategy:
- Focus Fire: Concentrate all team fire on the eyeball. It will glow when hit.
- Dodge & Weave: His attacks are powerful but telegraphed. Use the dodge roll (Circle/C) to avoid his swipes and charges.
- Environmental Hazards: Look for explosive barrels or gas canisters in the lab. Lure Birkin near them and shoot to detonate for extra damage and a brief stun.
- Character Abilities:
- Lupo (Super Soldier): Activate for burst damage on the eyeball.
- Spectre (Threat Detector): Mark Birkin to increase team damage.
- Beltway (Satchel Charge): Place charges near him for heavy damage, especially when he's stunned.
- Bertha (Stim Pack): Keep teammates healed, as his attacks can quickly deplete health.
- Ammo Management: This fight can be ammo-intensive. Use your most powerful weapons on his weak point.
Keep your distance, focus fire on the eye, and dodge his attacks. If he charges, try to dodge to the side and continue firing. This fight is a test of basic combat mechanics and target prioritization.