A second soldier can enter at any time and help with surviving the Vietnamese Jungle.
Captain Addis (you) mission is simple: Get back into the Vietnamese Jungle, follow the Ho Chi Minh trail and free a couple of American airmen that were left behind and are still waiting for rescue - 20 years after the end of the war.
For whatever reason the Vietnamese are not so happy to see you and through every soldier at you that they got. So you have basically kill everything in sight to finish your mission.
This page contains co-op info for Caliber.50 on the Arcade [Classics]. All information about Caliber.50 was correct at the time of posting. Information is subject to change. If you see any errors please email us.