Save the World or Conquer It that the thing but for do that you gonna need speed and a lot of speed
The Story start in a confusing way but then get interesting on the road.
The Story is split in 2 side Hero and Dark in Hero you play as Sonic, Tails and Knuckle as you go around places to stop Eggman from taking over the world but as you go Sonic is being hunted by G.U.N Forces due to think he have stole a Chaos Emerald only to be Shadow the one ho doing this. In Dark Side Story Eggman has release the Ultimate Weapons from his grandfather only to be Shadow the Hedgehog once release both of them decide to steal the Chaos Emerald with the help of Rouge the Bat and stop Sonic from saving the world.
Voice Acting
Okay some characters voice are well done these are Sonic, Shadow, Eggman and Knuckle but the others Tails, Amy and Rouge start in a bad way but somehow in the end you see that they voice get better so you got a mixes voice acting here.
Sonic/Shadow Levels
They are the speed and it really fun getting the rings while running really fast and doing some spin dash at our enemies it really entertaining but there few levels
Tails/Eggman Levels
They are the shooting ones and like Sonic and Shadow levels these are fun as well, while they are slower they still make some fun levels because we get to blow things up and feel unstoppable
Knuckle/Rouge Levels
They are the Treasure Hunting levels and instead of being really fun like the others these are more like okay due to have a terrible camera in many moment and you mostly gonna be looking for the thing for hours
Music
The music is great and fit well in every levels some moment you will hear someone signing making it more fun this is something that Sonic Team never fail
Sound Effect
Sound just like the old times from collecting ring jumping on those jump pad and blowing thing up
Chao World
At first i didn't know anything of what the chao i have to do but now i do it seem to be like they let you take care and have your own Chao it seem like a great idea for Sonic Fan but i didn't find it really that into me
Final Verdict
Sonic Adventure 2 is a great game and worth your money for Sonic fans and does that want something new and fast yes there are some mixes thing but still this game is a really fun one especially the boss fight
Good
-Fun Gameplay
-Music
-Boss Fight
-2 Side Story
Mixes
-Story start confusing at first
-Voices Acting (For some characters)
-Chao World