To beat the mongoose he always hides in the center missle.

Shoot at the side missle and then gas will come out.

Do this until you see an image of him coughing.

Then with your A.R. blast him with a grenede. If ur lucky it will blast the missle to and he will start to cough.

When the middle missle comes down a spad will come down and he will fall. grab his materials.

Then he'll go and say 2 find him.search around and try 2 blast the missle he's near with your A.R. or your M60.

Then you can beat him.

By the way the end sheridon ends up bieng number 1. the game stinks in the end it says 2 b continued...