ELECTRONIC	w   w   w dot x e o d e s i g n dot c o m   s l a s h   x e o d e s i g n   u n d e r s c o r e   w h y w e p l a y g a m e s dot p d f l a n g u a g e	www.xeodesign.com/xeodesign_whyweplaygames.pdflanguage	1