Castle of the Winds is a Windows 3.1 roguelike game created by Rick Saada. It was published in 1993 by Epic MegaGames.
Rick Saada released the game for free in 2003.
The 16-bit, Windows 3.1 version requires either a VM or a shim like WineVDM to run on 64-bit Windows.
There's an excellent interview with Rick on the development of Castle of the Winds at Gamasutra