Weapon X (1995)
Weapon X is a fictional clandestine government genetic research facility project in Marvel Comics. They are conducted by the Canadian Government's Department K, which turns willing and unwilling beings into living weapons. The project often captures mutants and experiments on them to enhance their superpowers, turning them into weapons. They also mutate baseline humans. The Weapon X Project produced Wolverine, Leech, and other characters such as Deadpool and Sabretooth.
Experiment X, or the brutal adamantium-skeletal bonding process, written by Barry Windsor-Smith in his classic story "Weapon X" (originally published in Marvel Comics Presents #72-84 in 1991), was eventually revealed as part of the "Weapon X Project." Grant Morrison's run on New X-Men in 2002 further revealed that Weapon X was only the tenth of an entire series of such projects, collectively known as the Weapon Plus Program, and the X in "Weapon X" referred not (or not exclusively) to the letter X, but to the Roman numeral for the number 10. The first project, Weapon I, pertained to the Super Soldier Project that created Captain America.