YES they exist, We have Christmas Nights which is a bitch to unlock for me becuase that last Nights level is nearly impossible. Deathsmiles II Daze Before Christmas which isn't a terrible sunsoft platformer. I THINK that's it though? Besides some demos.
XBOX live indie game the Xmas Chainsaw massacre. Santa kills his elves or they envelop him and beat him to death.
I know OP mentioned Christmas NiGHTS, but how could you not play that at Christmas? I do every year Anyhow, Diddy Kong Racing has a Christmas level.
There was also a Christmas-themed expansion for Duke 3D. Some PC games from around the same time also had Xmas easter eggs, I know Tyrian and Rise of the Triad do.
How can you forget bible games on the NES? Lol santa Claus saves the earth on playstation was Wierd as hell as I recall.
as far as im aware telegames are selling their NOS (new old stock) for that game you can get it seled for like £5 on Amazon, looks quite weird I must agree. an old CLASSIC! I remember playing that game about a decade ago, it was so crude.
here is a few ideas ! http://videogamecritic.net/vgc_xmas.htm for christmas games and for winter/snow games > http://videogamecritic.net/vgc_winter.htm that should have a few ideas =D
Not exactly a Christmas game, but Shenmue can take place during Christmas, and there are decorations and stuff, and you can even meet Santa Claus.
I always thought Zool was kinda Christmassy, but looking at a video on youtube now it seems to be more sweet themed. Must be all the white in the background that made me think of Xmas.
james pond has snow and stuff, and im sure there's a santa model for Quake 3 Arena, Christmas deathmatch would be fun