I know from first-hand experience that single-player games can be plenty addictive. But I suspect that there's an element of social pressure that acts like a st

I know from first-hand experience that single-player games can be plenty addictive. But I suspect that there's an element of social pressure that acts like a stick, keeping players from slowing down his gaming activity. A guild member would be letting his guild down if he chose to stop grinding for example.