It has infinite ammo so you can just go nuts hitting or and playing lumberjack with your new friends. One of the default weapons given to you in my SnapMap is the chainsaw, which counts as a glory kill every time it's used. You are (nearly) invincible, have infinite ammo, and permanent quad damage once you enter the arena part of the map. If you follow the short tutorial texts on the screen, you can continue into a small arena and use buttons on your controller to spawn demons. Setting the lobby type to private does not void this achievement. To find it, simply hit to open the search function from any tab in the SnapMap mode and search for 'KFADVXWV' (the capitalization does not matter.) Once you locate the map, make sure you hit to 'Play' the map, because 'Save to my downloaded maps' will not count if you launch it from your downloaded maps. I have created a SnapMap as a one-stop shop for several achievements, including this one. The only thing I can recommend if this is occurring is to try again later or the next day, since they seem pretty good about getting the servers back up. Some are reporting issues where the Doom servers are indicating there is no connection which has been somewhat of a theme going back several years. If you simply hit again you'll see the map listed, the 'One stop achievement shop' which seems to be still searchable and playable. After discussing, we believe all three elements are important parts of the complete DOOM experience, and are meant. If you enter the map's ID 'KFADVXVW' then move the cursor down to 'SEARCH >' and hit, the game doesn't seem to do anything but show a little red box on the right with the same ID in it. DOOM is comprised of a single-player campaign, online multiplayer, and SnapMap. Personally I haven't used it in a very long time and I don't recall how it used to work, because I had trouble figuring out how it worked for a minute or two. There seems to be an issue with the search function in SnapMap at the moment.

Doom snapmap tutorial next map settings