Altered is a 2006 American science fiction horror film directed by Eduardo Sánchez and written by Jamie Nash. It was Sánchez's first solo effort as director, following his co-directing of The Blair Witch Project in 1999.

The plot is an inversion of the standard alien abduction formula, as four men abduct an alien, planning to wreak revenge on the invading species. In its early stages, the film was titled Probed, and was intended as a comic homage to the work of Sam Raimi and Troma Entertainment.