Pong for 4 people. I don't even have one friend who will play arcade games with me though. I can imagine however that this is slightly more fun than pong. On the other hand, pong is only relevant anymore for its importance to the history of the medium, whereas Pong Doubles is just a little spin-off concept of that game that's already not genuinely that fun. So...

2 - Average: Just another game in a world with far too many