Halloween 2010 was the first Halloween event on Transformice. This was the first event to be held in Transformice.
Map
The entire event takes place on the map 666, the cheese has wings and teleports regularly at any point on the map, as players mounted on broomsticks are trying to get to the cheese.
Collision is enabled on the map which makes the cheese even more complicated to catch.
Shop
The items were won by completing the map a number of times.