A super soldier (or supersoldier) is a concept soldier capable of operating beyond normal human abilities through technological augmentation, ranging from powered exoskeletons to advanced training regimens or (in fictional depictions) genetic modification or cybernetic augmentation.

Super soldiers are common in military science fiction literature, films, and video games. Examples include Starship Troopers by Robert A. Heinlein and The Forever War by Joe Haldeman. Super soldiers are also prevalent in the science fiction universe of Warhammer 40,000 and its prequel The Horus Heresy. Critic Mike Ryder has argued that the super soldiers depicted in these worlds serve as a mirror to present-day issues around sovereignty, military ethics and the law.^[2] Marvel Comics, and by extension the Marvel Cinematic Universe, feature a wide array of heroes and villains whose powers are obtained through various competing attempts to create a super soldier, including Captain America, Hulk, the German Red Skull, and the Russian Red Guardian.^[3]

Fictional super soldiers are usually heavily augmented, either through surgical means, eugenics, genetic engineering, cybernetic implants, drugs, brainwashing, traumatic events, an extreme training regimen or other scientific and pseudoscientific means. Occasionally, some instances also use paranormal methods or technology and science of extraterrestrial origin. In entertainment, the creators of such programs are viewed often as mad scientists or stern military personnel depending on the emphasis, as their programs would typically go past ethical boundaries in the pursuit of science or military might. Some depictions can in particular be categorized as cyborgs or cybernetic organisms due to the cybernetic nature of their augmentations.^[4]

In 2022, the People's Liberation Army Academy of Military Sciences reported that a team of military scientists inserted a gene from the tardigrade into human embryonic stem cells in an experiment with the stated possibility of creating soldiers resistant to acute radiation syndrome who could survive nuclear fallout.^[5]

In the book The Men Who Stare at Goats (2004), Welsh journalist Jon Ronson documented how the U.S. military repeatedly tried and failed to train soldiers in the use of parascientific and pseudoscientific combat techniques during the Cold War,^[6] experimenting with New Age tactics and psychic phenomena such as remote viewing, astral projection, "death touch" and mind reading against various Soviet targets. The book also inspired a war comedy of the same name (2009) directed by Grant Heslov, starring George Clooney.^[7]