Kena: Bridge of Spirits_Forge Bridge Cursed Chest near waterfall
Easy challenge as long as you immediately run down to the enemy spawn point to make your stand. You need only defeat 15 enemies and from this vantage point you can accomplish it with MULTIPLE DOUBLE / TRIPLE kills. If you haven't gotten the Piercing Arrow achievement by time you reach this, you'll definitely get it here if you follow this guide.
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