Mutant Lines started out as a guy trying to figure out how to build a train engine, and evolved into a Garry's Mod train company. To join Mutant Lines, you are either lucky enough to get invited, or just ask one of the players wearing the "MutL" group tag for a train driving test. If you pass, welcome aboard! We dont have any addons special to the group yet but are going to start working on them soon.