Sonic Generations Collection

Classic Era:

Tier 1:
-Green Hill (Sonic the Hedgehog)
-Chemical Plant (Sonic the Hedgehog 2)
-Collision Chaos (Sonic CD)
-Rival Battle 1: Metal Sonic in Stardust Speedway (Sonic CD)
-Boss 1: Death Egg Robo (Sonic the Hedgehog 2)

Tier 2:
-Angel Island (Sonic the Hedgehog 3)
-Mushroom Hill (Sonic & Knuckles)
-Sky Sanctuary (Sonic & Knuckles)
-Rival Battle 2: Knuckles the Echidna in Launch Base (Sonic the Hedgehog 3)
-Boss 2: Big Arm (Sonic the Hedgehog 3)

Tier 3:
-Radiant Emerald (Sonic R)
-Botanic Base (Knuckles' Chaotix)
-Panic Puppet (Sonic 3D Blast)
Rival Battle 3: Fang the Sniper in South Island (Sonic the Fighters)
-Boss 2: EggMech vs. Super Sonic (Sonic & Knuckles)

-Special Stage: Casino Night (Sonic the Hedgehog 2)




Dreamcast Era:

Tier 1:
-Speed Highway (Sonic Adventure)
-Cosmic Angel (Sonic Advance)
-Seaside Hill (Sonic Heroes)
-Rival Battle 1:  E-102 Gamma in Egg Carrier (Sonic Adventure)
-Boss 1: Egg Emperor (Sonic Heroes)

Tier 2:
-City Escape (Sonic Adventure 2)
-Lost World (Sonic Adventure)
-Route 99 (Sonic Advance 3)
-Rival Battle 2:  Rouge the Bat in Meteor Herd (Sonic Adventure 2)
-Boss 2: Biolizard in Final Hazard (Sonic Adventure 2)

Tier 3:
-Radical Highway (Sonic Adventure 2)
-Pumpkin Hill (Sonic Adventure 2)
-Grand Metroplis (Sonic Heroes)
-Rival Battle 3: Shadow the Hedgehog in Final Chase (Sonic Adventure 2)
-Boss 3: Perfect Chaos vs. Super Sonic (Sonic Adventure)

Special Stage: Chao Garden (Sonic Adventure)




Modern Era:

Tier 1:
-Crisis City (Sonic the Hedgehog 2006)
-Sand Oasis (Sonic & the Secret Rings)
-Camelot Castle (Sonic & the Black Knight)
-Rival Battle 1: Silver the Hedgehog in Kingdom Valley (Sonic the Hedgehog 2006)
-Boss 1: Egg Dragoon (Sonic Unleashed)

Tier 2:
-Rooftop Run (Sonic Unleashed)
-Sky Park (Sonic Rivals)
-Mad Gear (Sonic the Hedgehog 4: Episode 1)
-Rival Battle 2: Sonic the Werehog in Apotos (Sonic Unleashed)
-Boss 2: Nega Wisp Armor (Sonic Colors)

Tier 3:
-Planet Wisp (Sonic Colors)
-Tropical Resort (Sonic Colors)
-Water Temple (Sonic Rush)
-Rival Battle 3: Blaze the Cat in Dead Line (Sonic Rush)
Boss 3: Time Eater (Sonic Generations)