A slasher movie mmo. You customize your own gaudy teenager and give them a class like "Dumb cheerleader" or "Lovable stoner". You spend your in game time in two different phases. The day phase where you go around and talk to locals, interact with other players, etc, and the night phase where all the npc's lock themselves inside and you have to survive generic movie villains.
You hide in trees, get in cars that don't start until the last second, and die in hilariously overly gory ways.You can defend yourself, but all the villains have 13 million health so all you'll do is distract them long enough for other people to get away. You can find weapons such as wood chippers, screwdrivers, machete's, etc, which are used to stun or slow down your enemies.
If you survive the night, you get experience, which can be used to buy beer, tents, pot, etc. You can also get experience by dieing in incredibly awesome ways. If, say, you just get decapitated you get no experience, but if you get all your limbs chopped off than get pushed face first through a wood chipper you get mondo experience.
If you accumulate enough experience, you can get more powerful weapons like the villains specific themed weapons (as each different monster will have a unique fell to them), mini guns, physic powers etc, witch can kill the villains. If you accumulate enough experience, than you get to design and control your own monster, but eventually you loose control of the monster. If the design is good enough, it will be added to the log of monsters after you loose control of it.
Now the world map will be designed after different cliché. A black and white twilight zone esq
land, a summer camp world, a large foreboding castle, a land of dream. Each will be populated by different classes of monster and the players created monster will be automatically assigned a world to live in.
TL

R a horror movie mmo.