Both fandom and original characters are welcome here, and there is no limit on PBs. Up to three variations of the same character are allowed. For example, the game could feature 17 year old Buffy Summers, 25 year old Buffy Summers, and a non-slayer Buffy Summers, plus other characters played by SMG.
The concept is simple. Characters check in to the Infinity Boarding House, as seen above. The boarding house appears to be a friendly place. Guests are greeted with an open air lobby, complete with a dining area and a roaring fire place. Any and all currency is accepted, and rooms are randomly assigned (muns have a say in this, characters do not).
The catch is, once a character has checked in, he may never leave. As players leave and characters flee the head space, characters will find a way out. Most will just fade in to obscurity. Others may meet an untimely end, or a surprising exit from the community.
Beyond the bounds of the boarding house, life goes on. Looking out, characters see what they expect to see (their own canon environment where applicable). So, Buffy Summers looks out and sees what appears to be a modern day Sunnydale, while Angel would see Los Angeles, despite looking at the very same space. There is no way to go past the fence surrounding the house, and no way communicate with those on the other side. They simply can not see the boarding house.
All super human powers are checked in at the door, reverting all characters to human status. Animals may be played as human, turning once they cross the threshold into the boarding house. Inanimate objects may not be played as characters.