Make host change the rules significantly. It is items available, various hps and bullets configurations, giving the option to have a lot of rounds, with the ability to change winning conditions and the turn order between and within the rounds, etc.
Then there could be something like game modes, where new specific rules are given (i.e. Halloween, where some visual aspects can be changed). For even more content you can change/add items and mechanics (i.e. "vampire mode").
These are some recommendations, and of course adding them all would be a very long journey. By that time, it will be possible to extend the maximum amount of players.
#Vast Settings
dawn lintel