Fuel the machine with the lost spirits from the tomb! Fight to the death! Run through hell! Try not to wet yourself from being so knee-shakingly terrified! Boo!
ctf_holyfuckaghost is a small neutral CTF map where teams must take the flag - a ghost! - to a large machine. The flag scares all nearby players, including the courier, so teams will have to work together to succeed. On capture, the machine will activate, triggering one of four random events.
It's technically a bastardised special delivery mode, but "sd_" overrides the CTF score counter HUD.