Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | Highlander | 1986 | |
| Writer | Backdraft - Männer, die durchs Feuer gehen | 1991 | |
| Writer | Highlander II - Die Rückkehr | 1991 | |
| Writer | Highlander: Endgame | 2000 | |
| Writer | OtherLife | 2017 | |
| Writer | Highlander - Die Quelle der Unsterblichkeit | 2007 | |
| Director | God's Army - Die letzte Schlacht | 1995 | |
| Writer | God's Army - Die letzte Schlacht | 1995 | |
| Writer | Backdraft 2 | 2019 | |
| Writer | Highlander - Die Macht der Vergeltung | 2007 | |
| Writer | God's Army 3 - Die Entscheidung | 2000 | |
| Writer | God's Army 2 - Die Prophezeiung | 1998 | |
| Producer | God's Army 2 - Die Prophezeiung | 1998 | |
| Writer | God's Army 4 - Die Offenbarung | 2005 | |
| Writer | God's Army 5 - Die Apokalypse | 2005 |