Far Cry 3 Blood Dragon Walkthrough You Got Time to Duck?
Objective Six : Protect Spider as he HacksTry alternating between the shotgun and the pistol. The shotgun for the enemies who come up close from behind the mainframe and the pistol for the enemies who try to kill you from the walkway to the left of where the main-frame is.
You will spend a long time here and will have to kill everyone before you can continue - use your med-kits if you need to. After Spider gets shorted-out, you need to make it to the missile control panel in a few seconds before the count-down gets finished.
So, forget all the enemies and just run for the panel which is marked with a pointer on your HUD. After that, you meet Solan under whom Rex used to serve.