Armadosia - the mad corridor is a great megawad released in 2005. It contains 32 large hard levels created by David Rivette "Arma Kero". With amount of details and monsters it's favourite and well-rated megawad.
The Armadosia is playable on most new ports (ZDoom, Doom Legacy, PrBoom), using Doom2.wad as IWAD.
The wad was updated in 2015 by the member of doomwolrd.com Never_again.He correct all bugs and misaligment texture and build the .wad for more compatibility ports.
Armadosia levels are unnamed, classic 30 levels + 2 secret levels.