Threewave CTF for Deathmatch Classic (unreleased) - The Bad Place (full level walkthrough)
The Bad Place is a map for Deathmatch Classic's cancelled addon, Threewave Capture the Flag.
Threewave CTF itself is a port of the Threewave CTF mod for Quake to Deathmatch Classic that never came out, but was leaked in 2003 with the Half-Life 2 beta and other content from Valve.
This is a CTF version of dmc_dm4, which is based on Quake's dm4 map. The blue flag is in the red armor room while the red flag is in the megahealth room.