opus casino (formerly "liquid vegas", "royal star", "liberty ii", "liberty i", "royal empress", "punta pedrera") is a cruiseferry built in 1985 in valencia, spain for marítima de formentera sa, to handle traffic between ibiza and formentera. in july 2012, the vessel was donated to the seasteading institute, and is currently available for bareboat charter or sale, preferably to businesses that could support experimentation with long-term ocean habitation.