DOOM 404 is a 32-level, vanilla-compatible (complevel 2) megawad. Every map was built with 404 lines or fewer, as a nod to the project name, to keep the map design focused on the key concept for each level. It's a sad life on the Space Marine IT Help Desk. Especially when you're stuck on the graveyard shift. Night after night of "Did you try rebooting?" Not exactly what you expected when you signed up. You figured this call would be more of the same: some garbled voice mail about "gremlins in the system". Gremlins? Seriously, how old is the guy who left that? Ninety five? He probably remembers vacuum tubes. Now you're here though, something isn't right. This facility should be busy, but it's silent. Almost desolate. You're starting to feel glad you brought that popgun they issued you with to make you look like a real soldier ...
