The Underground (1966)

A gang of Nazi bikers prepares for a race as sexual, sadistic, and occult images are cut together.

A drifting ex-soldier turns underground fighter with the help of a just-released ex-con, pitting him against corrupt cops and hired killers now gunning for him and all those he cares about.

A figure known as "The Assassin" descends from the heavens into a nightmarish pit full of monsters, titans, and cruelty.

When a team of explorers venture into the catacombs that lie beneath the streets of Paris, they uncover the dark secret that lies within this city of the dead.

Trapped in a London subway station, a woman who's being pursued by a potential attacker heads into the unknown labyrinth of tunnels beneath the city's streets

Clinging to a smooth, curved surface high above a sentient abyss, a woman tries to cover the few feet back to safety without losing purchase and falling to her death.

Karen, a young psychiatric nurse, boards the last subway train of the night only to have it stop in the middle of the tunnel. Suddenly, her nightmare begins: a mysterious cult has decided that it's the end of the world and the only way to save the souls of the living is to kill them in cold blood. As those around her are brutally murdered, Karen and a handful of survivors must face the homicidal cult, supernatural forces, and their own fears of Armageddon in order to survive.

A mob's punishment of a lone man proves cruel and unusual.

When a small outpost is ambushed, a US Army squad must take the battle below ground on a high-stakes mission in a new type of warfare the likes of which they have never seen.

After a catastrophic car crash, a young woman wakes up in a survivalist's underground bunker, where he claims to have saved her from an apocalyptic attack that has left the outside world uninhabitable.