[thejeff]

If we're digging back into old games:

Illuminati (Not the collectible card version)
Nuclear War (& Escalation)

More card games than board games, I guess. Neither at all serious, but an awful lot of fun.

From "The Boy Sprouts are using Orbital Mind Control Lasers to control the Mafia?" to "Woof! Any one have change for 20 million people?"