This is Siberia, a map from The Asian Dynasties expansion pack adapted for AoE3, the game without expansions.
You can now play the great winter map from The Asian Dynasties expansion pack on the game without expansions too.
For the first time in Age of Empires III maps, there is a snow trade route on a winter map.
The treasure set is from the Yukon map, with lots of good treasures.
The icelake area in the middle is now smaller, which makes rushing with a forward base a more viable strat.
--> Download the .zip file and unzip the file
--> Copy/move the Siberia.xml and Siberia.xs files to the RM folder, inside the user Age of Empires III folder