Plutonia 4: Back to Your Hole (sometimes simply called Plutonia 4), is a limit removing joke WAD with 32 levels created by Roberto Lopez (Gothic). Originally made as a homage to SilverMiner's Plutonia 3: Going to Surface, the WAD themes are inspired by Plutonia and its unofficial sequel. As with many joke WADs, Plutonia 4 includes farcical elements such as ridiculous enemy placement, intentionally unpleasant map design, and humorous custom graphics.