Big Kahuna Reef 2: Chain Reaction is a puzzle game that was created by Reflexive Entertainment. It is the sequel to Big Kahuna Reef. This casual game is a three in a row matchmaking game. The player must make strings of objects in order to break the boxes beneath; when all of the boxes are broken the level is complete. Like the title before it, Big Kahuna Reef 2 has thousands of user-made levels that can be downloaded in game, in addition to the standard levels made by the developer. Big Kahuna Reef 2 also introduced power-ups (bombs), hence the extended title Chain Reaction.
Around the 7th of December 2017, the official website that hosted all user-made levels and the forums for both the Ricochet (Ricochet Infinity, Ricochet Lost Worlds and Ricochet Lost Worlds: Recharged) and the Big Kahuna series were permanently shut down because they were no longer sustainable to run.