Stephen King had two books written under his pen name Richard bachman made into movies What were the books?

You're absolutely right! Stephen King had two of his Richard Bachman novels adapted into films:

* "Rage" (1977) was adapted into a film in 1983.

* "The Running Man" (1982) was adapted into a film in 1987.

King later admitted to writing both under the Bachman pseudonym, and "Rage" was even pulled from circulation due to its controversial content.