Writing

1994

Nobody's Children … Writer

1986

Death of an Angel … Writer

1984

Obsessive Love … Story … Teleplay

1982

Friday the 13th Part III … Author

1977

The Last Wave … Screenplay

1972

Through Dusky Ways … Writer

Acting

2013

Crystal Lake Memories: The Complete History of Friday the 13th as Self

Art

2023

Bamse and the World's Smallest Adventure … Storyboard Artist

Directing

1986

Death of an Angel … Director