Halloween 2010 was the first official Transformice event, just nearly 6 months after release, and while the game was still in open beta (V0.zzz).
| Name | Image | Release date | Release version |
End date | End version |
|---|---|---|---|---|---|
| Halloween 2010 | 
|
22 October | V0.111 | 10 December | V0.124 |
| Christmas 2010 | 
|
10 December | V0.124 | 2 January | V0.129 |