Hotel Romanstein is a mod for shareware Wolfenstein, made by Mr. Choi. It was released on August 31, 2004.
The mod was based on Hotel Pornostein, an X-rated mod taking place in a brothel. For Hotel Romanstein, the X-rated sprites and textures were replaced with a manga/anime theme, and all nudity was covered up with bikinis or bathing suits or saw the actors replaced altogether with female guards first seen in Batman: Wrath of Mr. Freeze.
The mod was released with a functioning 4GL port allowing it to be played without emulation on newer machines. No source code changes were featured, making it playable in SDL as well.