Drain Cleaner
From Halopedia, the Halo wiki
Template:New Content Drain Cleaner is an achievement in Halo Wars tied to the unreleased map Memorial Basin. To earn it, a player must kill twenty enemy squads with a continuous Covenant Leader Power. One tactic to get this achievment is to use the Arbiter's rage mode against an army of infintry since the Arbiter in rage mode can be difficult to take out.
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