Serious Sam Revolution - [64 Bit] Mayhem (Serious) 

A very short and simple map set in a little temple-like complex in the middle of literally nowhere, where you just have to kill everything that moves without a story or weird puzzles, just my favorite stuff. The graphics are very basic, resembling old great shooters like Doom or Quake. Very fun map with some nice music even if it's not from the classic SS's soundtracks. Thanks to Laki for this one
Steam's workshop page:
steamcommunity...
I've played this map in blind run at Serious difficulty. When you see the fades, it generally means that I've died there, or that I went back somewhere to pick up some stuff or that I've reloaded 'cause I let myself be hit too much in stupid ways