As someone who's worked on RPGs before (NWN, ME1, DAO), the reason is because all that branching dialogue for ONE human player is complex enough that you need a dedicated team of writers and technical designers just to implement, let alone expanding it to support multiplayer and all the myriad possibilities and desires and such.James Joseph Emerald said:This isn't a thread about my game ideas though, I'm just wondering why something like this hasn't ever really been done. It seems like the RPG genre was originally based on pen-and-paper games, but the spirit of imagination and collaborative storytelling was swiftly discarded, and nobody has ever really gone back for it.
Case in point, even in SWTOR the MP conversation is more of a random roll to determine which party in the group of 4 says the line. And you're just talking 4 players and light side/dark side options!
Back in my NWN modding days, we tried to do a multiplayer conversation for DragonLance (after all, it's an adventure designed for 9 players). Even without the problem of how to hand off a conversation to another player (limitation in the NWN engine), the possible outcomes just got unwieldy.
AFAIK, the only game that could really suit this is NWN with a proper DM set up. A computer and preplanning just can't handle the dynamics of live players.