Dark Opera is a variant of Haunted Mansion created by Mokina in May of 2008 for The Whole Sort of General Mish Mash. The game took place on the Nomad, a luxury space cruise ship threatened (presumably) by some kind of alien menace. There were lasers, robots, and a fair amount of surreal humor. Things exploded without provocation. People died before they could say /in.
Wizardcat took over modding responsibility for Dark Opera during Mokina's V/LA and made the game significantly more fatal than it already was.