[Amiga]
Christmas Dizzy (The game screen itself didn't feel Christmassy enough.)
Christmas Me Out (The game screen itself didn't feel Christmassy enough.)
Cuento De Navidad: A Christmas Carol (The game screen itself didn't feel Christmassy enough.)
DC2Lvl-Xmas (Not stand-alone game.)
DC2Lvl-XmasII (Not stand-alone game.)
DC2Lvl-XmasIII (Not stand-alone game.)
Elf Spirit Hunters (The game screen itself didn't feel Christmassy enough.)
XMAS Worms (Not stand-alone game.)
Young Salzgitter Icefighter, the (The game screen itself didn't feel Christmassy enough.)

[ZX Spectrum]
Frumpy: Christmas Jumper (The game screen itself didn't feel Christmassy enough.)
Lockdown Town ZXmas (The game screen itself didn't feel Christmassy enough.)
Shapeshifter: Christmas Edition (The game screen itself didn't feel Christmassy enough.)
XMASoid (The game screen itself didn't feel Christmassy enough.)

[NES]
8 BIT XMAS 2017 (Due to a compilation of 8bit Xmas series ('08~'16))
8 BIT XMAS 2018: Xmas Skiing (The game screen itself didn't feel Christmassy enough.)

[Gameboy/Gameboy Color]
Don't Get Poo'd On By A Reindeer (The author himself has deleted!)
Gingerbruvs 12 Second Snack-Down (The game screen itself didn't feel Christmassy enough.)
Life's Too Short GB: A Christmas Spirit (Halloween game rather than xmas game)
Lily And The Lost Angel (The game screen itself didn't feel Christmassy enough.)
Sezza vs. Duckmas (Due to fatal graphical glitch.)

[Atari 2600]
AtariAge Holiday Greetings 2006: Toyshop Trouble (The game screen itself didn't feel Christmassy enough.)
The Gizzle Wap and the great Blizzard of Firn (The game screen itself didn't feel Christmassy enough.)