So I just finished King's Quest 4 at 100%
http://i48.tinypic.com/2ql6fqa.jpg

and I received a code

GQEB9N4B7AD

What do this code?Where I must insert it?

According on this:
http://www.sierraplanet.com/kingsquest4/walkthru.html

Note About Special Codes: In some early versions of this game, you may get a special code at the end of the game. If you are curious as to what this code is for, there was a contest that Sierra had over 10 years ago (so obviously it is over by now). On many of the original game boxes, there was a sticker that said, "The Great Master Adventure Contest -- Win a Trip to England or one of 2000 other prizes (see details inside)." Whoever was the first to finish the game and send in that special code found only at the end of the game won the trip (it was a couple from New York). Three runners-up got a new Tandy computer, and a 1000 others got either free software or a T-shirt.

From here: http://www.sierraplanet.com/kingsquest4/walkthru.html Edit - I'm too slow. :(

So I'm arrived late to win that trip XD

Old game promotions are almost always awesome

I wonder if unused Pizza Hut coupons for a free pizza from that TMNT Nes game are still valid....