If you look the back of the box of Sonic 3D Blast it says that there are 14 levels! But I counted them and my total is 7! 8 with the Final Fight! So, why do they said that there are 14 levels??

Theory #1 (From SecMan)

oh come on SonKnuck, it's easy to guess why the Sonic 3D box says 14 challenging levels! Acts 1 & 2! Act 3 and Final Fight don't really count as levels....

His Reply: To continue what I was saying (you know, about Sonic 3D)

The Boss levels (Act 3 and Final Fight) do not really count as levels, at least not in the way that the box means

that means 7x2=14!!!

Theory #2 (From Rlan)

The 14 levels are probably including the 2 special stages as 1 level (as 7x2=14)

Theory #3 (From Rocket)

14 levels in Sonic 3D Blast (excluding bosses which are mini-levels):

1 GGZ1
2 GGZ2
3 RRZ1
4 RRZ2
5 SSZ1
6 SSZ2
7 DDZ1
8 DDZ2
9 VVZ1
10 VVZ2
11 GGZ1
11 GGZ2
12 PPZ1
13 PPZ2
14 PPZ3