idk about you but I have a few achievements I need I am not sure if it works in custom games but anyone wanna work on this?
All of the multiplayer achievements have to be earned in matchmaking. This means it’s probably going to be pretty hard, even if you have some buddies, because matchmaking is filled with unknowns. Almost every game is different. My advice for you, enjoy the game and play it more. However, many of the dlc achievements are much to hard to get now that they have stopped supporting the game, so I would say to give up on some of those.