One random vault dweller will be a maniac. His aim is to kill every other dweller. Aim of others is to find out who is this maniac! Maniac will be the same level like others (1?), but he has a weapon! He must hide it from others and show it only to someone, when he gotta use it! There's also be LIMITED number of radios, computers/terminals for blocking/opening doors in special rooms. Also some NPCs who will provide any quests fot getting XP/items but also it'll force players to be alone, or complete quests all together. The Maniac has access to all terminals and computers, he can use cameras there to see locations and people, and when someone is alone, he can come there, say "hello.." and ask why he is alone, and then blow his head with his gun.
