Chiesa, La (1989) [Writer] (uncredited) ... aka Cathedral of Demons ... aka Demon Cathedral ... aka Demons 3 ... aka In the Land of the Demons ... aka The Church
Cyborg, il guerriero d'acciaio (1989) [Writer] (writer) ... aka Cy Warrior ... aka Cy Warrior: Special Combat Unit (Italy: video title)
Gioko, Il (1989) (TV) [Writer] (screenplay) ... aka Alta tensione - Il gioco (Italy: series title) ... aka School of Fear (International: English title)
Predatori della pietra magica, I (1988) [Writer] (writer) ... aka Predators of the Magic Stone (International: English title) ... aka Raiders of the Magic Ivory
A cena col il vampiro (1988) (TV) [Writer] (screenplay) ... aka Brivido giallo - A cena col vampiro (Italy: series title) ... aka Dinner with a Vampire (International: English title)
Casa dell'orco, La (1988) (TV) [Writer] (screenplay) (story) ... aka Brivido giallo - La casa dell'orco (Italy: series title) ... aka Demons III (UK) ... aka Demons III: The Ogre (USA: video title) ... aka The Ogre (USA) ... aka The Ogre: Demons 3
Maestro del terrore, Il (1988) (TV) [Writer] (screenplay) ... aka Alta tensione - Il maestro del terrore (Italy: series title) ... aka The Prince of Terror (International: English title)
Quella villa in fondo al parco (1988) [Writer] (story and screenplay) (as David Parker Jr.) ... aka Ratman (video box title) ... aka Terror House (Italy: DVD box title) ... aka The Rat Man
Thunder III (1988) [Writer] (writer) (as David Parker Jr.) ... aka Thunder Warrior III (USA: video title)
Colpo di stato (1987) [Writer] (writer) (as David Parker Jr.) ... aka The Overthrow
Ragazzo dal kimono d'oro, Il (1987) [Writer] (writer) (as David Parker Jr.) ... aka Fist of Power (USA: video title) ... aka Karate Warrior (USA) ... aka The Boy in the Golden Kimono (USA: video title)
Camping del terrore (1987) [Writer] (screenplay) (as David Parker Jr.) ... aka Body Count ... aka Camping della morte ... aka The Eleventh Commandment (USA)
Fino alla morte (1987) (TV) [Writer] (screenplay) (story) ... aka Brivido giallo - Per sempre (Italy: series title) ... aka Changeling 2: The Return (UK: video title) ... aka Per sempre (Italy) ... aka Until Death
Notte al cimitero, Una (1987) (TV) [Writer] (screenplay) (story) ... aka Graveyard Disturbance (International: English title) (USA) ... aka Brivido giallo - Una notte al cimitero (Italy: series title)
Soldier of Fortune (1987) [Writer] (writer) (as David Parker Jr.) ... aka Running Combat ... aka Soldato di ventura (Italy)
Demoni 2... L'incubo ritorna (1986) [Writer] (writer) ... aka Demoni 2 (Italy: short title) ... aka Demons 2 (USA) ... aka Demons 2: The Nightmare Is Back (USA) ... aka Demons 2: The Nightmare Returns (USA: video title)
Vendetta dal futuro (1986) [Writer] (writer) ... aka Fists of Steel (UK: video title) ... aka Hands of Steel ... aka Mani di pietra (Italy: alternative title) ... aka Return of the Terminator (Malaysia: English title)
Morirai a mezzanotte (1986) [Writer] (screenplay) (story) ... aka The Midnight Killer ... aka You'll Die at Midnight
Nudo e selvaggio (1985) [Writer] (uncredited) ... aka A Baixada dos Dinosauros (Brazil) ... aka Cannibal Ferox 2 (UK: video title) ... aka Massacre in Dinosaur Valley (International: English title) ... aka Perdidos no Vale dos Dinossauros (Brazil) ... aka Stranded in Dinosaur Valley (USA)
Inferno in diretta (1985) [Writer] (story and screenplay) ... aka Amazon: Savage Adventure ... aka Cut and Run (International: English title) ... aka Straight to Hell (International: English title: literal title)
Thunder II (1985) [Writer] (writer) (as David Parker Jr.) ... aka Thunder Warrior II (USA: video title)
Cane arrabbiato (1984) [Writer] (story) (as David Parker Jr.) ... aka Caccia all'uomo ... aka Mad Dog (Europe: English title: video title) ... aka Man Hunt (USA: TV title) ... aka The Manhunt (USA)
Blastfighter (1984) [Writer] (story) (as Frank Costa) ... aka Exécuteur, L' (France) ... aka Force of Vengeance
Shark: Rosso nell'oceano (1984) [Writer] (screenplay) ... aka Apocalypse dans l'ocean rouge (France) ... aka Devil Fish (USA) ... aka Devilfish (USA: video box title) ... aka Devouring Waves ... aka Monster Shark (Philippines: English title) ... aka Red Ocean ... aka Shark: Red on the Ocean (International: English title: informal literal title)
Impatto mortale (1984) [Writer] (story and screenplay) (as David Parker Jr.) ... aka Deadly Impact (USA)
Guerrieri dell'anno 2072, I (1984) [Writer] (screenplay) (story) ... aka Fighting Centurions ... aka Rome, 2072 A.D. ... aka The New Gladiators ... aka Warriors of the Year 2072
Thunder (1983) [Writer] (screenplay) (as David Parker Jr.) (story) (as David Parker Jr.) ... aka Thunder Warrior (USA: video title)
Guerra del ferro - Ironmaster, La (1983) [Writer] (screenplay) ... aka Guerre du fer, La (France) ... aka Iron Master (Philippines: English title) ... aka Ironmaster (UK) ... aka Ironmaster, la guerre du fer (France) ... aka The Iron Master (UK: video box title)
Sterminatori dell'anno 3000, Gli (1983) [Writer] (writer) ... aka Death Warriors (Europe: English title: video title) ... aka Exterminador de la carretera, El (Spain) ... aka Exterminators in the Year 3000 (USA: video box title) ... aka Exterminators of the Year 3000 (USA)
1990: I guerrieri del Bronx (1982) [Writer] (screenplay) (story) ... aka 1990: The Bronx Warriors (USA) ... aka Bronx Warriors
Manhattan Baby (1982) [Writer] (screenplay) (story) ... aka Evil Eye ... aka Eye of the Evil Dead (USA: dubbed version) ... aka Malocchio, Il ... aka The Possessed
Due gocce d'acqua salata (1982) [Writer] (screenplay) (story) ... aka Blue Island (International: English title)
Squartatore di New York, Lo (1982) [Writer] (writer) ... aka New York Ripper (USA: video title) ... aka Psycho Ripper ... aka The New York Ripper ... aka The Ripper
Assassinio al cimitero etrusco (1982) [Writer] (story) ... aka Crime au cimetière étrusque (France) ... aka Mistero degli Etruschi, Il (Italy: reissue title) ... aka Murder in an Etruscan Cemetery (USA) ... aka Scorpion with Two Tails
Quella villa accanto al cimitero (1981) [Writer] (screenplay) ... aka The House Outside the Cemetery ... aka The House by the Cemetery (USA) ... aka Zombie Hell House (USA)
E tu vivrai nel terrore - L'aldilà (1981) [Writer] (screenplay) (story) [Actor .... Mob Member] (uncredited) ... aka Aldilà, L' (Italy: short title) ... aka And You Will Live in Terror: The Beyond (Italy: literal English title) ... aka Seven Doors of Death (USA: censored version) ... aka The Beyond (International: English title)
Paura nella città dei morti viventi (1980) [Writer] (screenplay) (story) ... aka City of the Living Dead (International: English title) ... aka Fear in the City of the Living Dead (Italy: literal English title) ... aka Pater Thomas (Europe: bootleg title) ... aka The Gates of Hell (USA)
Ultimo cacciatore, L' (1980) [Writer] (screenplay) ... aka Cacciatore, Il (Italy: alternative title) ... aka Hunter of the Apocalypse (UK) ... aka The Last Hunter
Apocalypse domani (1980) [Writer] (screenplay) (as Jimmy Gould) (story) (as Jimmy Gould) ... aka Apocalipse Cannibal ... aka Apocalipsis caníbal (Spain) ... aka Apocalisse domani (Italy) ... aka Cannibal Apocalipsis ... aka Cannibal Apocalypse ... aka Cannibal Massacre ... aka Cannibals in the City ... aka Cannibals in the Street ... aka Invasion of the Fleshhunters ... aka Savage Apocalypse ... aka Savage Slaughterers ... aka The Cannibals Are in the Streets ... aka The Slaughterers ... aka Virus (Spain)
Zombi 2 (1979) [Writer] (uncredited) ... aka Island of the Flesh-Eaters ... aka Island of the Living Dead (Europe: English title) ... aka Ultimi zombi, Gli (Italy) ... aka Zombie (USA) ... aka Zombie 2: Gli ultimi zombi (Italy: DVD title) ... aka Zombie Flesh Eaters (UK)
Schock (1977) [Writer] (screenplay) (story) ... aka Beyond the Door II (USA) ... aka Schock (Transfert-Suspence-Hypnos) ... aka Shock (USA: video title) ... aka Suspense
Sette note in nero (1977) [Writer] (screenplay) (story) ... aka Murder to the Tune of the Seven Black Notes ... aka Seven Notes in Black ... aka The Psychic (USA)
Napoli si ribella (1977) [Writer] (writer) ... aka A Man Called Magnum (USA)
Polizia è sconfitta, La (1977) [Writer] (writer) ... aka Elimination Force (Canada: English title: bootleg title) ... aka Stunt Squad (Philippines: English title)
Mark colpisce ancora (1976) [Writer] (writer) ... aka Mark Strikes Again (USA) ... aka The .44 Specialist (International: English title)
Trucido e lo sbirro, Il (1976) [Writer] (writer) ... aka Free Hand for a Tough Cop ... aka Tough Cop
Roma a mano armata (1976) [Writer] (screenplay) ... aka Assault with a Deadly Weapon (USA: video title) ... aka Brutal Justice (USA) ... aka Rome Armed to the Teeth ... aka Tough Ones (Europe: English title)
Mark il poliziotto spara per primo (1975) [Writer] (screenplay) (story) ... aka Mark Shoots First (International: English title) ... aka Ultimatum (Europe: English title)
Mark il poliziotto (1975) [Writer] (screenplay) (story) ... aka Blood, Sweat and Fear (USA) ... aka Mark of the Cop (USA) ... aka Mark the Narc (Europe: English title)
Uomo della strada fa giustizia, L' (1975) [Writer] (writer) ... aka Manhunt in the City (International: English title) ... aka The Manhunt (USA)
Reazione a catena (1971) [Writer] (story) ... aka A Bay of Blood (International: English title: uncensored intended title) (USA) ... aka Antefatto - Ecologia del delitto (Italy: new title) ... aka Bloodbath (UK) ... aka Bloodbath Bay of Death (UK: unauthorized video title) ... aka Carnage ... aka Chain Reaction (Italy: literal English title) ... aka The Last House on the Left, Part II (USA: reissue title) ... aka Twitch of the Death Nerve (USA: new title)
Gatto a nove code, Il (1971) [Writer] (story) ... aka Chat à neuf queues, Le (France) ... aka Neunschwänzige Katze, Die (West Germany) ... aka The Cat o' Nine Tails (USA)