https://www.moddb.com/mods/the-nameless-mod/d … ssion-20-update

The Nameless Mod Mission 20 update is the first of three patches to update TNM to version 2.0. This patch is designed to update all maps in Mission 20, and any revisited maps found in Mission 22. Be advised that you may experience some bugs or weirdness. If you would like the full TNM 2.0 experience, wait until all three patches are completed.