Given that many want to know more about the game, I will satisfy your curiosity. =)
The story mode of "Project X" has a total of 8 stages and each one has its own inhabitants.
Note: All levels were based on the Mobius of "Project R". Remember that.
STAGE 1
Egg Argonaut
This giant squid is one of many battlecruisers of Eggman Empire. The Argonauts are ideal to attack cities and take prisoners. Its crew is made up of robots.
STAGE 2
Leaf Forest
It's a forest located on the outskirts of Emerald Town. Its fauna is the same as in any forest on the planet, but it is also home to many colonies of chao.
STAGE 3
Atlantis Ruins
The ruins of an ancient civilization, submerged in the seabed. A coral reef inhabited by colorful lifestyles.
STAGE 4
Hooga Booga Kingdom
This land is dark and grim, but friendly and funny at once. A kingdom where every day is Halloween and the jokes are the order of the day.
STAGE 5
River of Fire
It is a large river of lava running through the bowels of Mobius, but to get to this place, have to descend through dangerous caves, inhabited by strange creatures.
STAGE 6
Mewfertitis Park
It's the largest casino-city in Mobius. Decorated with Egyptian motifs, is a place where every day there are parties, fashion shows and concerts. The city that never sleeps.
STAGE 7
Empire City
The largest and most powerful city of Mobius. Here are concentrated the most powerful corporations of the planet. It's also the home of the president.
STAGE 8
Delta Labs
The secret government laboratories. Nobody knows what goes on in these facilities. Rumors speak about of monsters and experiments with Mobians, but the truth is only knows by the scientists working there.
ARENA MODE:
The arena mode is performed in a "Green Hill Zone Simulator". When you can complete the simulation, the character is transported to the area of specimens of "Delta Labs"
I hope I have clarified your doubts. Once again, thanks for the support. ^^
Special thanks to Unfaithful =P