Prisión Fatal (English: "Deadly Prison") is both the name of a major show series promoted by the Mexican Lucha Libre, or professional wrestling promotion International Wrestling Revolution Group (IWRG) as well as the name of the match that always main events the show.
Starting as far back as at least 1997, the Mexican wrestling promotion International Wrestling Revolution Group (IWRG; Sometimes referred to as Grupo Internacional Revolución in Spanish) has held several annual events where the main event was a multi-man steel cage match where the last wrestler left in the cage would be forced to either remove their wrestling mask or have their hair shaved off under Luchas de Apuestas, or "bet match", rules.
In late 2000 IWRG promoted a variation of the steel cage match under the moniker Prisión Fatal ("Deadly Prison"), the first such event to ever bear the name.
The added chain helps to distinguish it from other Steel cage matches held throughout the year such as the IWRG Guerra del Golfo ("Gulf War"), IWRG Guerra de Sexos ("War of the Sexes") or IWRG El Castillo del Terror ("The Tower of Terror") shows.
Rody and Oficial Factor are the only wrestlers to be forced to unmask while Pirata Morgan, X-Fly and Alan Extreme have had their hair shaved off as a result of the match.