bbs door games, can they be set up for two player games?

[rockdoc2010]

i am interested in creating a game that would be similar to a door game.

 

the idea is a character that has a split personality must find a solution or xxx...

 

two players would each take turns sending him down their desired paths.

 

in other words, your actions make the character go one way..

his actions make the character go the other way

 

i was thinking that this could be accomplished via null modem btween two players in the same room

 

any thought would be well appreciated

 

Douglas