This is a bit of an older game, and hopefully some of you know it or have heard of it at least.
The basic premise is that everyone is on a cruise ship and each person has a target they need to kill, while tending to their needs. This does mean that while you are hunting, someone is hunting you. There are guards and cameras and if you are spotted you go to jail for a bit. I have played this with only a handful of people and it was really fun. With more it is really great.
Save 80% on The Ship: Murder Party on Steam <– Check it out.