The Great Wall: Corebox

In The Great Wall, the players take the role of Generals defending the Wall against the Mongol Horde. The game is played over a series of turns called Years, each divided into 4 parts called Seasons. This is an asymmetric worker/soldier placement game with engine building themes and a twist in form of a constantly attacking AI (Mongolian Horde) that requires players to sometimes cooperate in order to defeat it.