Robert Gutierrez is listed in the credits for the following albums:
| Year | Artist | Album | Role |
|---|---|---|---|
| 1993 | Ultimatum | Fatal Delay | Guitars |
| 1995 | Ultimatum | Symphonic Extremities | Guitars |
| 1998 | Ultimatum | Puppet of Destruction | Songwriter, Guitars |
| 2001 | Ultimatum | The Mechanics of Perilous Times | Guitars |
