If i download a demo of a game on p.c. and have the reg. code could i get the who game?

would depend on the game, some of the smaller games from reflexive or similar can be converted to full games with codes


if you want to register a demo of a large game with a full version reg code it will not work , You need to buy the game as large demo games only include a level or two ,the full version may contain hundreds of levels and gigs in size. e.g. Colin Mcrae Dirt demo is 840 meg ,full version is 7+ gig, huge difference in size