Micro Manager

Micro Manager is an Achievement in Halo Wars that is unlocked when the player completes Scarab without destroying any Power Nodes.

It is worth 5 Gamerscore.

Strategy
Set the game difficulty to Easy, activate the Emperor skull and do nothing but MAC Blast the Scarab until it dies.

Don't try this on any other difficulty as the Scarab will not die before it incinerates your base.