The problem with power gamers that nobody seems to be discussing (that I saw) is not the effect on the game, but the effect on other players. Seems like a lot of GMs talking here, saying, "Just increase the difficulty of the monsters!" -- have any of you ever been a player in this situation? For a long time, I played with a group where the characters were pretty balanced between various types of combat stuff and other things. We got a new player who really knew the system we were playing really well, and suddenly challenging combats became the new guy decimating every monster. The GM raised the difficulty of the monsters to make them challenging for the power player, and the rest of the group ended up getting one-shotted by the monsters. Nobody died, but every melee character except the power players' was immediately unconscious or running away after the first hit. The game pretty much died after that. The GM gave us a dragon to slay and we poisoned its water supply. :| Combat was no longer fun. Once initiative was rolled, the game belonged to the power player -- other players started pulling out PSPs. (Or in my case, drawing -- I got a lot of art done during those games!) While I do think that the GM handled things badly in this case, I've had those problems myself, as a GM. Most of the group will make balanced characters with a variety of skills, and one guy will dump all his money and points into combat skills and notice and the best armor he can afford. It's all well and good to give the PCs challenges that can't be solved by beating something to death, but still. It's upsetting to a wizard when the fireball he finally got access to still isn't as good as the team beatstick punching the monster in the face.