The Survivors (1983 film)

The Survivors is a 1983 comedy film directed by Michael Ritchie. It stars Walter Matthau and Robin Williams.

Donald has become paranoid and convinced of the imminent collapse of society. He buys several guns, leaves his girlfriend, and goes to a Vermont survival camp led by a man named Wes. Jack is released from jail. Sonny tries to reason with him, and Jack agrees to leave Donald and Sonny alone if they say nothing to the police. Sonny and Candice go up to the camp to tell Donald of the deal. Donald, however, is so confident of his ability to face danger that he taunts Jack into coming up to the camp for a final showdown.Donald has become a killing machine thanks to Wes teachings. He and Jack do battle, and end in a draw. The whole group winds up in the same cabin, which the other campers surround in an attempt to kill Jack. Sonny, Candice, Jack and Donald escape in Sonnys car. The bloodthirsty campers give chase, but give up once Sonny exposes Wes as a rich businessman whose camp is a fraud. The foursome head home. Donald gets out of the car and has a breakdown, realizing how much he has lost. Sonny tries to comfort him. The two walk back to the car as friends. ........

Source: Wikipedia