Hey, two joysticks would be awesome

. But would it actually be possible if they were on the USB port, because I don't think there are many people around with two gameports...
But again, then there would be a problem with typing commands, and it would be so different from the AGI games we know...

Now that we're talking about two keyboard players, mouse and two joysticks, let's make a five-player game

...
Anyways, I guess the only Idea that would work out for adventure games is to have one main player who is on the keyboard and one minor character with some other control, as was already suggested earlier.