The following games are tagged with christmas

Chrimblast
Spectrum 48K/128K/+2
Dave Hughes

Computer Christmas Card
Spectrum 48K
Virgin Games

Crimbo
Spectrum 48K/128K
Little Shop of Pixels

Elf: The Movie
Game Boy Advance
Crave Entertainment

Freeze64 Christmas Game
Commodore 64/128
Freeze 64

Moley Christmas
Spectrum 48K/128K
Your Sinclair

Santa Claus Jr. Advance
Game Boy Advance
Jowood Productions

Santa's Xmas Caper
Spectrum 48K/128K/+2/+3
Zeppelin Games

Santron
Commodore 64/128
Sarah Jane Ivory

Sleighbells
BBC Model B
Gemini

Special Delivery
Spectrum 48K
Creative Sparks

Summer Santa
Spectrum 48K/Plus
Alpha-Omega

The Musical Snowmen
Spectrum 128K
Brown

The Snowman
Spectrum 48K
Quicksilva