Boardgames

I heard one of the world's top diplomacy players is actually plays honorably like 95% of the time. He makes deals with almost everyone early on and generally to their benefit more than his own since building repoire and trust with folks allows you a greater deal of leverage over more of the board. But that's at the highest levels of play.

I played a month long play by e-mail game once with some friends in college. About half of them no longer talk with me because of that game hehue.