box2d : Box2D is an open source physics engine written primarily for games. ( http://www.box2d.org )
pilas : An engine to make games in an easy way with Python. Made in Argentina. ( http://pilas-engine.com.ar )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a jorgicio
For Paludis use this rsync : rsync://gentoo.zugaina.org/jorgicio-portage
If you have a problem : ycarus(-at-)zugaina.org