That'll Be the Day to Dungeon Siege III in 8 Steps
- That'll Be the Day was inspired by the song 1941
- 1941 was written by Harry Nilsson
- Harry Nilsson wrote One
- One was published by Unichappell Music
- Unichappell Music published Marchin' Down Broadway
- Marchin' Down Broadway was published by Six Continents Music
- Six Continents Music published Best Friend
- Best Friend is heard in Dungeon Siege III