The ship is one of these games that you should consider owning simply because it is such a classic title. It is starting to show a little bit of it's age but the cartoony style helps.
This is basically the multiplayer game equivalent of a murder party turned FPS game, you only have one quarry per round, but knowing that someone is after you and that it is the only other person that you may kill without repercussion adds a healthy dose of paranoya to the mix.
The game throws in a fair bit of deception too, change clothes to lose the trail of your killer, the maps are rigged with a few original traps and secret passages, And there are a few tools for the crafty players, such as sleeping drugs and wallet bombs.
There are maps of various sizes that will accomodate a good variety of players (unlike a lot of games this is sort of important on the ship) and it also has "passenger bot support" which can help to add a "bulk" of innocents if you lack in player volume. Bots can also be hunters but they are pretty poor at this job.