NY00123's first abandoned CK4 level pack
NY00123's first abandoned CK4 level pack (albeit it would be considered as more of a mod) features 4 levels, although only 3 of them are complete. Sand Yego was edited to include an area for testing out the switches. Most of the graphics in the mod are horizontally flipped, and one-way passages are included. This mod is also notable for taking the orientation into account, when entering a house. The Indoors layout is logically rotated by 180 degrees in contrast to its outside surroundings. While the layout above ground makes you to go from left to right, entering a house and going underground, this same direction appears as right-to-left again.
Two of the levels were featured in Buried in Oblivion.
Spoiler warning! This shows the whole levels.