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Welcome Back is the very first level in Bloons 2 and the first level of Popping Fields. It is in the shape of the number 2 (probably because it is the starting level of Bloons 2) and it is very easy to beat, because of the amount of bloons the player is required to pop, and how the bloons are all clustered together.
- 24 Bloons must be popped, which is a reference to the game's release date (9/24/10).
- The Bloons form into the number 2 which is another obvious reference to the game's title (Bloons 2).