I am a sucker for a thematic worker placement game. In this game, you spend the first part of the round placing workers to gain resources (classic) and then spend those resources on building a wall (titular) and hiring spear/bow/horse-men to defend the wall from invading armies.

It feels like there's some overlap with After the Empire, which I enjoyed. You can play it as a co-op with the difficulty ramped up instead of a competitive version.

And look at that wall