Ultimate Doom Builder Tutorial: Part 14: You, GZDoom, and 0-Tagged Linedef Actions

In this series, I create a new Doom 2 map from scratch, in order to teach how to use Ultimate Doom Builder. In this video, I reexamine what happens if you forget to set tags on linedef actions, and show how GZDoom "fixes" this for you and causes your map to be broken in other source ports. Always test your map in multiple source ports to avoid embarrassing mistakes like this!