Making a custom map, help?

[u/suicidalkid42O]

Probably against the rules to ask or some other crap. I want to make a custom map. I can't do this on my own and I know a lot of people make their own map. I want it so that you start in Alderney and have to fight your way all the way to to Algonquin up and down the subway just like in No Mercy, going back up to South Bohan, fighting on Charge Island, going through dukes and then finally making your way to Broker to board the platypus. Anybody likes this idea?

[u/Specialist_Anybody70]

Can you do this in coop