MechAssault Walkthrough:
Payback

Blow all identical mechs up - one is an officer - use summoner "don't be distracted".

Follow, shoot them down and start chasing them along a path. Stay on the upper level first and shoot down enemies. "They're in full retreat".

Just focus on each one and grab its health when it dies. Stay in the upper area of the map and shoot down at them. Let them get past you and forward.

MechAssault Walkthrough, Tips and Techniques