although hosted at pio.sf.net, the name of the game seems to be "pioneers" and other distros have it packaged as such. I suggest that Gentoo do the same unless there is some reason that I'm unaware of for called it "pio". Reasoning: if a user has heard of this game and tries to locate it in portage they will encounter some difficulty (for example, emerge -s pioneers won't find it).
Done. =]
