Handy With Tools

Handy with Tools is an achievement in Halo Wars that is unlocked when you repair the Power Core in under four minutes on mission 12.

Tips
An easy way to do this, is to build as many Cyclopses as you can, and use the healing function of the Spirit of Fire for the energy core. Also it won't hurt to build a couple of turrets with flame mortar or missile upgrade to take out the Hunters, Jackals, Grunts and Banshees, without it the level will take longer and the charging enemy will become a problem. Wolverines and Hawks are also good to have at the ready, because Wolverine's volley ability usually takes out some of the major threats like Locusts in a few seconds, and the Hawks are for protecting the Wolverines while their special ability recharges.