This is the Train Sim World 6: Special Jingle Jam Edition from the current Jingle Jam, which includes:

"Train Sim World 6: Jingle Jam Edition brings three additional iconic train simulation experiences to players. Speed across the French countryside in the LGV Méditerranée Add-On, manage American commuter trains in the MBTA: Boston-Framingham & Worcester Add-On, and save Christmas from a mischievous Holiday Elf in, unique to the Jingle Jam Edition, the Holiday Express: Holiday Elf narrative adventure!"