The five battles that you can play in PUP are Tours, Hastings, Honfoglalas, Kurikara and Bapheus. The battles are specifically chosen for the fact that they make for co-op scenarios. Now, you can fight alongside a friend in the game in five historical battles for now. Co-op mode has arrived in Age of Empires II: Definitive Edition with update 50292, Microsoft announced via the game’s Twitter account.