ConC.E.R.Ned

ConCERNed (or ConC.E.R.Ned) is a 2013 megawad for Doom containing 27 levels, replacing the first three episodes. It was created by Matt Powell (cannonball). The name stems from the plot of the wad taking occurring at a futuristic version of the CERN's Large Hadron Collider.

Powell subsequently created the Return to Hadron series of episode replacements that are refined versions of the ConCERNed levels. In addition, his episode 4 replacement called Thy Flesh turned into a draft-excluder is sometimes considered a sequel.