Stargate meets Farscape RPG
I ran an Farscape adventure at two cons in conjunction with another table who was running Stargate SG-1 RPG. Neither table knew about the other but the Gms would be in communication off and on. At a specific piont, we would turn to the opposite table and say “You see them … ” and let the role play happen.
Ran this with Terry Corbit at MACE 2007