The Gatehouse (2019)

From publisher blurb:

This adventure location can be placed at the entrance to any castle or city, for when you want to add a little flavour into your game.
Recently, the castle has been plagued by a thief who has been sneaking in, stealing jewels from the nobles and getting his cargo out. For this reason, the security at the gatehouse is tighter than usual and guards have been ordered to check any incomers for weapons, contraband or stolen items.

This is a systemless two-page dungeon adventure that we created live on stream! This dungeon is designed with extreme usability in mind, to be slotted easily into whatever campaign you are running, spanning over one or two sessions.