Power Stone [Sega All Stars] - Loose - Sega DreamcastPower Stone 2 adds heaps of new characters and environments to the already established crew, however there are now 4 players doing battle at a time in both single and multiplayer modes. This time, the top 2 from every round (in other words the two that survive each fight of 4 players) progress to the next round. And after a few rounds, you will battle it out with huge Bosses that take up most of the screen.