I have created a SnapMap as a one-stop shop for several achievements, including this one. 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.
Setting the lobby type to private does not void this achievement.
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. You are (nearly) invincible, have infinite ammo, and permanent quad damage once you enter the arena part of the map.
For this achievement, simply hit
and/or
to spawn enemies and melt them with the BFG. Because you have permanent quad damage, every kill you get counts as a powerup kill while in the arena. You can hit the spawner buttons as many times as you like, but the game will only allow 12 demons on the screen at any one time.
This map is also great for:
Solution for Timing is Everything In DOOMSolution for Up Close and Personal In DOOMSolution for No Rest for the Living In DOOMSolution for Butcher In DOOM