Lemme guess, the shotgun is an analogy to an early-era computer virus, eh?
Viewing post in DOOM OS
Hehe, honestly, it just seemed gratifying to me to walk around my filesystem, pull out my shotgun and blast old files away i don't need anymore
Makes cleanup a bit cathartic ;) Bumping into file marked by the system as 'executable' will even give you the option to start it from within DOOM OS, though that one might be a bit hit and miss...