‘Twas the night before Christmas, and all through the house, not a creature was stirring, not even…Santa’s Second World War-vintage self-propelled gun?
This is a Christmas greeting from Wargaming, developers of the amusing World of Tanks. So, yeah, the reindeer are out, replaced by tanks.
https://kotaku.com/welcome-to-the-world-of-tanks-30878968
Few games, or developers, could pull this off without it looking stupid. Since World of Tanks is an MMO where you play as a tank, though, yeah, they can pull it off.