H.R. Giger's artistic style is characterized by a unique blend of biomechanical elements, surrealism, and dark, otherworldly imagery. His work often features intricate, highly detailed depictions of surreal landscapes, biomechanical creatures, and eerie, erotic themes. Giger's art is renowned for its dark, haunting atmosphere, and his use of techniques such as airbrushing and stippling creates a sense of depth and texture that adds to the unsettling nature of his pieces. Overall, his style is unmistakably distinct, evoking a sense of the macabre and the uncanny.