Animal House (1978) – Writer
Meatballs (1979) – Writer
Caddyshack (1980) – Writer, Director
Stripes (1981) – Writer, Actor
National Lampoon’s Vacation (1983) – Director
Ghostbusters (1984) – Writer, Actor
Ghostbusters II (1989)- Writer, Actor
Groundhog Day (1993) – Screenplay, Actor, Director, Producer
Analyze This (1999) – Screenplay, Director
Analyze That (2002) – Screenplay, Director
Knocked Up (2007) – Actor
Year One (2009) – Writer, Actor, Director, Co-Producer
The Office (2006-2010) – Director of four episodes.