CorsixTH

CorsixTH: a new Theme Hospital Open source engine that revives Theme Hospital to work on modern computers, though it requires original game data files either the demo or the full version to be able to run the game. CorsixTH team main goal is to make the game available for Windows, Linux and Mac OSX, they have provided executable versions for Windows and Mac OSX, and several Linux/ BSD packaged versions. They also provided detailed instructions on how to run the game.

CorsixTH has been translated to 18 languages, as it also has very active forums.

Isn't it a waste of time to recreate something which works fine in DOSBox?

The original game does work in DOSBox, but it retains all of the problems which the original had, including:

Resolution limited to 640x480

Sound is always temperamental

Lack of useful features like staff zoning

Limited set of levels

The beta 5 crash in the [French Version] Miscellaneous bugs and glitches