oh yes Christmas NiGHTS is amazing!
It is more than a *demo*, it is a full fledge fucking side story in my eyes..
as it has so many things to unlock, so many bonuses, plus the time/date specific stuff...
It doesnt sell for that much on ebay, if you like nights, you owe it to yousrelf to own this game..
speaking of which, i am going to sell my burning rangers, it just doesnt hold up these days as anything amazingly special.. i used to love it, but now adays. i basically only want to turn on my sega saturn for nights, fighter's megamix, last bronx and virtua fighter kids..
speaking of those: last bronx and virtua fighter kids i just got this last month; and they are both great... always wanted last bronx back in the day, can remember reading the previews and being wowed by the graphics.. well the graphcis suck today, just like all the other saturn games (except for nights, which still amazes me ... seriously)... but last bronx is a whole lot of fun.
and for a virtua fighter fan, virtua fighter kids is just a great romp.
EDIT:
mind you, i am a huge Nights freak, and sleep every night, since 97 or so, on a nights into dreams pillow.. i am 23, and still use that pillow.. even though the image is so faded i can barely see it.