@Cammy:
AFAICT, "Christmas BoulderDash" is Guido Mersmanns unchanged "BoulderDaesh RTX" and should be removed again (development on said game started in 1989, latest version is from 2006). The author himself ("Geit") was suggesting his title in this very thread, but that was meant as a joke - he made the same joke on amiga-news.de.