It depends on what platforms you're looking at. Steam is rife with Christmas/Holiday games, though a stunning amount of them are of pretty low quality.
Personally, there are a few good games that I recommend to people, which you might not have tried out yet:
SantaCraft - Steam (It's a top-down grid-based survival crafter. It started out pretty simple, but they've added a few free updates since then)
Little Inferno - Ho-ho-holiday DLC - Steam (A game where you get to burn stuff, but this time there are holiday items and decorations as well as other stuff)
Viscera Clean-up Detail - Santa's Rampage - Steam (A game where you clean up after the song "The Night that Santa Went Crazy by Weird Al. A stand-alone taster for the main VCD game.)
Santa's Xmas Caper - C64 (A side-scrolling shooter where you have to blast your way to a happy christmas. Simple but fun.)
Santa Clause In Trouble - PC (A full 3D platformer, though it'll play like ass unless you have specific stuff installed or us a VM. Also has a full paid-for sequel with way more content and stuff for you to do.)
Christmas Stories: Nutcracker - PC (hybrid of hidden-object-games and point-and-click games. You have to save the Nutcracker and his GF at Christmas. Pretty fun)
Holiday Lemmings - DOS (a holiday-themed version of the classic DOS puzzle game. You can actually get 4 different version from '91-'94, but the last version has all the levels, so probably get '94.)
The Grinch - GBC (I know you already know about the PS1 version, but on gameboy colour it was actually a pretty intresting grid-based stealth game, rather than the 3D action-adventure that you're familiar with. Actually much better on handheld)