- 100 Days to Go (Unreleased)
- Across the River
- Across the River (Secret World Live) prod. by Peter Walsh
- A Different Drum
- After the Ordeal by Genesis prod. by Genesis & John Burns
- After the Ordeal by Steve Hackett prod. by Roger King & Steve Hackett
- A.I. by OneRepublic prod. by Brent Kutzle, Ryan Tedder & Steve Wilmot
- Aisle of Plenty by Genesis prod. by Genesis & John Burns
- Amazing* (Unreleased)
- Am I Very Wrong? by Genesis prod. by Jonathan King
- And Still (Bright-Side Mix)
- And Still (Dark-Side Mix)
- And Still (In-Side Mix)
- And Through the Wire prod. by Steve Lillywhite
- Animal Magic prod. by Robert Fripp
- Animal Nation
- Anyway by Genesis prod. by Genesis & John Burns
- Anyway (Live from The Shrine Auditorium, Los Angeles, CA, 24th January 1975) by Genesis prod. by Genesis, Geoff Callingham & Nick Davis
- A Place to Call My Own by Genesis prod. by Jonathan King