The Old Dark House (1932)
The Cabinet of Dr. Caligari (1920)
Dr. Jekyll and Mr. Hyde (1931)
Haxan (1922)
Freaks (1932)
The Hands of Orlac (1924)
Mystery of the Wax Museum (1933)
The Phantom of the Opera (1925)
Island of Lost Souls (1932)
A Page of Madness (1926)
The Black Cat (1934)
London After Midnight (1927) [Reconstruction]
Frankenstein (1931)
The Hunchback of Notre Dame (1923)
Dracula (1931)
The Golem (1920)
Murders in the Zoo (1933)
Nosferatu: A Symphony of Horror (1922)
Murders in the Rue morgue (1932)
The Monster (1925)
The Most Dangerous Game (1932)
The Fall of the House of Usher (1928)
The Raven (1935)
A Daughter of Destiny (1928)
The Invisible Man (1933)
He Who Gets Slapped (1924)
The Mummy (1932)
While Paris Sleeps (1923)
Doctor X (1932)
The Unknown (1927)
The Dybbuk (1937)*
* OK; I’ll admit that technically “The Dybbuk” doesn’t count as Pre-Code Horror, but just try to imagine making that film in America in 1937.