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Like the name suggests, this is a battle arena. There is no food cost, no gold or lumber cost, so basically you just have to out produce the enemy. I really would have liked this map more if there were some shops or a tavern or maybe even some mercenaries to hire because just making a bunch of units and throwing them at the enemy does get a little dull without shops or mercs to spice it up a bit. But this is the map makers first attempt so I'll give it a decent grade in the hopes something better will come.