Multi Cultural Achievement in Age of Empires: Castle Siege

This will probably be the last achievement you will earn in the game. At this point, you probably don’t need crowns and you’re already in the 8th age – so, the best thing to do is just ‘snipe’ your opponents for their resources (mainly lumber) and pennants. Try your best to avoid opponents that you don’t need pennants from. To upgrade each respective unit to level 4, you need 715,000 wood and 7,500 pennants for each unit.