PS. You're a psychiatrist aren't you?
No... a programmer. I just need a psychiatrist. And if I was, then I'd have done the three way prisoner's dilemma.
a) choose give, split, or take it all.
b) if one person chooses take it all- they get everything.
c) if more than one person chooses take it all, and the other chooses anything else, that person gets everything.
d) if everyone chooses give, then everyone gets something... and a bonus.
e) if one or two people choose give and the other(s) split, then the split is between those that chose split.
f) If everyone chooses take it all, no one gets anything.
g) any non-covered arrangement is an even split.
Now *that* would be interesting to watch
But this way, no one knows what anyone else chose, unless everyone chooses split.