The Blizzard Castle course in Sonic & Sega All-Stars Racing take place on and around the castle from Billy Hatcher and the Giant Egg.
- Icicle Valley - This course goes through some ice caves, which can have branching paths if you know which way to go.
- Rampart Road - This course takes place on the castle, and has many secret paths towards the finish. Dodge the rolling eggs!
All of the songs are from Billy Hatcher and the Giant Egg.
- Tumbling Xylophone
- A Jack-in-the-Box!
- Bossa Nova of Briny Air
- Volcanic Orchestra
- Billy's Courage