Halloween 2012
In the third annual Transformice Halloween Event, there are three different maps to play. In every map, players had to kill or avoid the skeletons and ghosts. Also, in each map, players have to do certains things to win a title/item.
Mice can attack (using a magic wand) the skeletons and ghosts, by pressing space bar. Also, the skeletons and ghosts can damage your mouse, making you loss one heart from your life bar.
Like the past halloween event, the map was named "Tigrounette", and again, it was a side-scrolling map. When the map starts all mice automatically change clothes to look like wizards.
In this event there are three different maps.
 Skeleton Mice, Skeleton Cat, and Ghosts
Some skeletons and ghost mice are spawned in certain points of the maps. They can damage you one heart per touch, but you can attack them using space bar to hit them with your wand. On the third Halloween map, there is a large skeleton cat with a few ghost spawns. Unlike the skeletons and ghosts, the cat has a large amount of health. Items can be unlocked after the cat is defeated.
 Life bar
In this event, your mouse has a 'life bar'. The life bar is composed by 4 hearts. When you touch one skeleton/ghost, your mouse loses a heart. If your mouse loses all the hearts, you will die.
 New features
The 2012 event brought: new halloween-themed map editor decorations, and a new halloween splash screen.
Also, the confetti animation changed, now you throw candies instead of confetti.
In addition, you are now able to get a title: "Vampire"! You can get this title by saying "bonbon" at the chest in the second Halloween map.