Sheep

Stage 1: Ferry Terminal, Harbor Small rooms.
Stage 2: Airfield, Train Yard, Water Treatment, Sewer Branch, Radtown and Power Plant rooms.
Stage 3: Launch Site, Military Tunnel and Missile Silo rooms.
Stage 3 to 4: The Airfield airdrop and Chinook call terminals.

One sheep (staging figures): 10 cloth, 20 leather, 50 bone fragments, 12 mutton, 20 animal fat, plus any wool it carries.