Game design can quite trivially trigger obsessive and compulsive responses and progressively increase time/money commitment to the next 'hit'. (see: Zynga) Bef

Game design can quite trivially trigger obsessive and compulsive responses and progressively increase time/money commitment to the next 'hit'. (see: Zynga) Before Zynga and before free to play games were popular, MMO's like WoW were the default case study for arguments about where the line is, between a pass-time and a conditioning chamber.