Battened Down the Hatches is an Achievement in Halo Wars that is obtained when the player prevents all of the airlocks on Cleansing from being destroyed.
It is worth 5 Gamerpoints.
- Play on Easy difficulty and activate the Sugar Cookies, Bountiful Harvest, Pain Train and Emperor Skulls.
- Try to make as many turrets as possible and place Cyclops Units beside the airlocks.
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