This is an odd title. Your goal, basically, is to wander the ship, interacting with the environment, until you find the person whose name you've been given; you're to kill this person without anyone seeing you. You also have the option of simply being a bystander; you don't have any goal, but can interfere with anyone's attempts to commit murder. (Troll-face optional.)

This gift includes the solo and multiplayer versions, and you'll also get a second copy of the pack to give to someone else -- and THEY will get two copies, and so on.

From the catalog:
The Ship is primarily a multiplayer, online murder game with a unique set of game rules.

The Ship is owned by the mysterious Mr X and as one of many 'lucky' recipients of a free ticket you arrive on board The Ship to find there's a catch to your luxury cruise.

You are coerced into a brutal Hunt to indulge Mr. X's fantasies, under threat of death for not only yourself, but also your family. Your only chance to save yourself and your family is to play the Hunt and win.