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Big Boss Confrontation BGM (Kraid, Crocomire, Phantoon) (大ボス対決BGM (クレイド,クロコマイアー,ファントゥーン)?)[1] is a boss battle theme in Super Metroid. It was originally composed by Minako Hamano.

It is used during the battles with Kraid, Crocomire and Phantoon, as well as the encounter with the Big Metroid in Tourian.

It is remixed in Metroid: Zero Mission, and used once again for the battle against Kraid. The theme in Zero Mission features a short introductory flourish when Samus steps into Kraid's chamber before flowing into the main theme. Notably, it also features piano strokes common in Metroid Fusion themes such as Sector 4 (AQA) Aquatic Control Level Area. The theme is included in the Sound Test as number 09.

It is one of two "Big Boss Confrontation BGM" themes, the other, used for Ridley and Draygon (and the escape sequences), would be titled "Vs. Ridley" in later years, becoming Ridley's signature battle music. The Mogenar boss and battle theme in Metroid Prime 3: Corruption resembles both Kraid and the Big Boss Confrontation BGM theme, and may have been intended as an homage.

In 2013, the theme was arranged by the WDR Radio Orchestra as part of Into Red, Into Dark.

The original theme from Super Metroid can be heard here, and the remix from Zero Mission here.