All Upgrades cheat – Starcraft n64
Episode 1, Terran Mission 4, The Jacobs Installation
Send ONLY Jim Raynor up the hall following the left wall (not shooting anything) make turn right at the first doors. Make him walk down that hall (press C-Right) you should come across a Civilian in Orange DONT SHOOT HIM he should talk to you. Send all your men through the doors including Raynor kill all the Goliaths then walk up the stairs you should have the cheat.