The tunneldm.zip file you have requested: Maps / Deathmatch / Tunnel Death Match - 297.84kb is not available. Perhaps try browsing all files for the game Doom III and upload any files you want to share or are missing. This is the only information we could locate:
This is a nice little Deathmatch map that requires you to utilize the darkness to survive. This is definately not your standard Quake III map, it requires a level of stealth and maybe a nice Ductape Mod.