MechAssault Walkthrough:
Wolf in Sheep's

This is a fun one. You walk into the enemy base as Thor. Be careful not to step on anyone! Walk fully into the base past the guards. Go to the back, to the com area to trigger them saying they're working on the com. Then go to back left, by the power grid and sit there. Note you can 'walk into' buildings without it triggering an alert, so walk into the power generator a few times to prepare it for destruction.

When they give you the signal (and be sure you WAIT FOR IT and don't jump the gun), you can then shoot the power generator. This opens the door. Now run away, shooting as you go. At the end, blow up BOTH halves of the bridge to end the mission.

MechAssault Walkthrough, Tips and Techniques