The game currently has 10 sets.

Promo Set (I call it a set since they are all placed together)

Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

Set 7 (Last one released by Triking Games, although they had plans for several other sets)

Set 8 (Released by the Fans)

Set 9 (Released by the Fans)