El Castillo del Terror (2008) was a professional wrestling event, their annual El Castillo del Terror event produced by the International Wrestling Revolution Group (IWRG).

The main event was the eponymous Castillo del Terror (Spanish for "Castle of Terror") Steel cage match where the last person eliminated was forced to unmasked per the match stipulation.

Starting as far back as at least 2002, 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 Lucha de Apuestas, or "bet match", rules.

The event featured six professional wrestling matches with different wrestlers involved in pre-existing scripted feuds, plots and storylines.

Wrestlers were portrayed as either heels (referred to as rudos in Mexico, those that portray the "bad guys") or faces (técnicos in Mexico, the "good guy" characters) as they followed a series of tension-building events, which culminated in a wrestling match or series of matches.