CHOOSE LEVELS FROM ANY SONIC GAME TO DO!!!
CHOOSE LEVEL FROM CLASSIC, MODERN AND NEW!!!
WRITE IN COMMENTS LEVELS AND MAYBE THAT LEVEL WILL BE!!!

You wanted to play ALL Sonic levels from any game? Well you can... kinda... Every level is in three parts: Classic part. Modern part, and brand new - Other part. In short - All levels from any Sonic Games shared in three parts.

Games:
Sonic the Hedgehog
Sonic the Hedgehog ( Gamegear)
Sonic the Hedgehog 2 ( Gamegear)
Sonic the Hedgehog 2
SegaSonic the Hedgehog
Sonic CD
Sonic Chaos
Sonic Spinball
Sonic the Hedgehog 3 & Knuckles
Sonic Drift
Sonic Trible Trouble
Sonic Drift 2
Knuckles' Chaotix
Tails Skypatrol
Tails Adventure
Sonic The Fighters
Sonic 3D Blast
Sonic Blast
Sonic R
Sonic Adventure
Sonic Pocket Adventure
Sonic Adventure 2
Sonic Advance
Sonic Advance 2
Sonic Battle
Sonic Heroes
Sonic Advance 3
Shadow the Hedgehog
Sonic Rush
Sonic Riders
Sonic the Hedgehog 2006
Sonic Rivals
Sonic and the Secret Ring
Sonic Rush Adventure
Sonic Rivals 2
Sonic Riders: Zero Gravity
Sonic Chronicles; The Dark Brotherhood
Sonic Unleashed
Sonic and the Black Knight
Sonic the Hedgehog 4: Episode I
Sonic Free Riders
Sonic Colors
Sonic Generations
Sonic the Hedgehog 4: Episode II
Sonic Lost World
Sonic Boom: Rise of Lyric
Sonic Boom: Shattered Crystals
Sonic Boom: Fire & Ice
Sonic Mania
Sonic Forces

If I forget about Any Sonic Game you can comment this and I will add that game to list.
I will do the Alpha version and you can choose 3 levels to play as character:
Example:
Green Hill Zone ( STH) - Classic Sonic
Kingdom Valley ( STH06) - Modern Sonic
Lyric's Tomb ( SB:RoL) - Glitch the Fox / Other Player name
So choose levels and wait for Alpha.