Sonic Generations - All Boss Themes

Blue Adventure:
0:00 Big Arms
3:36 Biolizard "Supporting Me..."
7:04 Egg Emperor

White Space-Time:
9:42 Death Egg Robot
12:39 Perfect CHAOS Pt-I "Open Your Heart - Crush 40 vs. Circuit Freq RMX"
17:15 Perfect CHAOS Pt-II "Perfect CHAOS Revival!"
19:46 Egg Dragoon

Final Boss:
22:46 Time Eater Ver.1
25:05 Time Eater Ver.2

Rival Battles:
27:28 Metal Sonic "Stardust Speedway"
29:15 Metal Sonic (US ver.) "Stardust Speedway"
31:19 Shadow the Hedgehog "For True Story - Circuit Freq RMX"
33:39 Silver the Hedgehog

• A lot of themes present in Sonic Generations are callbacks to older game themes, such as:
Big Arms (Sonic 3's final boss theme)
Supporting Me (Sonic Adventure 2's penultimate boss theme)
Egg Emperor (Sonic Heroes)
Death Egg Robot (Sonic 2's final boss theme)
Open Your Heart & Perfect CHAOS Revival (both from Sonic Adventure's final boss)
Stardust Speedway (both Sonic CD's Stardust Speedway zone themes)
For True Story (sonic adventure 2's final shadow boss theme)
Silver (sonic 06's character boss theme)