WCW/nWo Thunder is a professional wrestling video game based on the professional wrestling television show of the same name, developed by Inland Productions and released on the PlayStation console by THQ in January 1999. Thunder is the sequel to WCW Nitro and updates the previous game with new characters and features, including cage matches, battle royals, weapon use, and the ability to select what stable each wrestler competed for (this included WCW, nWo Hollywood, nWo Wolfpac, Raven's Flock, and The Four Horsemen). However, Thunder received poor reviews. Many of these were due to its graphics, style, and overall atmosphere, which bore too many similarities to WCW Nitro, along with concerns that the game was too easy.

New versions of the game's predecessor Nitro were released for Microsoft Windows (in December 1998 shortly before Thunder's release) and Nintendo 64 (in February 1999 shortly after Thunder's release). Both versions featured the updated roster from Thunder.