Hello
I am close to finishing the game, but I want to also start up a new separate game to co-op with friend while leaving my original solo play in tact. Is this possible? Thanks.
On PC you can copy your save file over to a backup location, otherwise no. Now if you bring your end game character to co-op to your friends game, then you get good guns in his new game. This can be fun if you wish or you can just reset your character and go on from there.