Nexus Total War is a standalone mod for Warzone 2100! The goal is to release a final version on Warzone's 20th anniversary.
This is an older version of the New Team War Mod (aka. Nexus Total War). It just changes the multiplayer part of the game which is very unstable. If it continue to stop working, then run it with Windows XP mode. Also you can try to start and quit the tutorial. After that, start this mode which you originally wanted.