Shadow Man is a 1999 action-adventure video game developed by Acclaim Studios Teesside and published by Acclaim Entertainment. It is based on the Shadow Man comic book series published by Valiant Comics. The game was released for Nintendo 64, Microsoft Windows, and PlayStation on August 31, 1999, with a Dreamcast version following on December 1.

The game was re-released in September 2013 by Nightdive Studios for Windows and OS X via digital distribution services. The studio later developed a remastered version with improved graphics and restored content, which was released for Windows in April 2021 and PlayStation 4, Xbox One, and Nintendo Switch in January 2022.

Shadow Man received positive reviews, with praise for its graphics, story, and presentation. However, the PlayStation version was negatively received for its poor technical performance. A sequel, Shadow Man: 2econd Coming, was released for PlayStation 2 in 2002. Another game starring Jack Boniface, Shadowman: Darque Legacy, was announced in 2023.

Shadow Man is sometimes considered a 3D metroidvania.

In 1888, Jack the Ripper – lamenting the fact that his ritualistic murders have not unlocked a mystical power that he believes to exist – prepares to perform the ritual upon himself at the expense of his own life. A man named Legion appears and tells Jack that the power he seeks does exist and offers to share this power with him if Jack constructs an insane asylum for like-minded killers in Deadside – the land of the dead. Proclaiming "for we are many!", Jack commits suicide.

In the present day, Michael LeRoi becomes the current Shadow Man – a lineage of voodoo warriors who protect the world of the living (known as Liveside) from threats crossing over from Deadside – after the voodoo priestess Mama Nettie bonds the Mask of Shadows to him. Nettie has a prophetic dream that Legion is preparing to usher in the Apocalypse by claiming the Dark Souls – the immortal souls of damned warriors – and using them to create an immortal army and send it into Liveside. Nettie reveals that Michael cannot stop the Five, a group of serial killers recruited by Legion, without his powers. The Five, who each have a Dark Soul within them, are hiding in Liveside, where Michael's powers do not work during the day. Michael travels to Deadside with the use of his dead brother's teddy bear, which serves as a link between both worlds.

After collecting all of the Dark Souls in Deadside and passing trials set by the gods of Deadside, Michael assembles a magic knife called the Eclipser. Returning to Liveside, Nettie uses the Eclipser to trigger an eclipse, which enables Michael to become the Shadow Man in Liveside. The ritual drains Nettie of her powers and causes her to go into a deep sleep.

Michael returns to Deadside and finds the Asylum as well as the Dark Engine which powers it. Michael finds his long-dead brother Luke within the Dark Engine along with several paths to Liveside which lead to the hiding places of the Five. Michael defeats the Five and claims each of their souls in the process. During this time, Michael finds Jack the Ripper's diary, which contains instructions on how to shut down the Engine. Michael returns to Deadside and shuts down the Engine, giving Luke his teddy bear back. Luke reveals himself to be Legion in disguise.