Bastille Day 2015 is a mini-event created to celebrate French National Day, which is celebrated on the 14th of July every year. In Transformice, the event started on July 10 and ended on July 20.
This event contains one event map that will play randomly in rooms, and the map lasts for one minute, instead of two.
In the map, you can click a part of the Eiffel Tower to toggle the light of certain parts. The player's goal is to light up all parts of the Eiffel Tower (solution shown at right).
If you die in the map (by sinking into the water), you will get a photo with a mouse sinking along with a "+1 wow!" text, which is probably an easter egg.
Upon finishing the instructions, the player will get the title « Sans-culotte »(365).
- Mice can go under the ground by entering the water, though it is risky since a slight late timing will kill the mice.