Might not qualify, but a few years back, my team started playing diplomacy online. I had never played a game involving so much back channel negotiation, double

Might not qualify, but a few years back, my team started playing diplomacy online. I had never played a game involving so much back channel negotiation, double crossing, and strategy. It had a funny effect on water cooler conversations because folks that I had a great relationship with would approach me with a noticeable air of disappointment as a result of some of my less than honorable decision making. I highly recommend this game to anyone with a group of friends looking for a turn based war game spanning many days.