The Upsetter is a rocksteady, reggae compilation that was originally released in 1969 on the Trojan label. The album features early recordings by the iconic producer Lee Perry. Most of the instrumentals are by Perry's studio band The Upsetters, but the recordings also feature vocal tracks by Busty Brown and The Muskyteers. The latter are also known as The Silvertones, but sometimes they recorded under the name of The Muskyteers. On The Upsetter they've recorded their version of Brook Benton's Sixties R&B/pop song “Kiddio”.

Tracklist:
A1 The Upsetters– Tidal Wave
A2 The Upsetters– Heat Proof
A3 Busty Brown– To Love Somebody
A4 The Upsetters– Night Doctor
A5 The Upsetters– Soulful I
A6 The Upsetters– Big Noise
B1 The Upsetters– Man From M.I.5
B2 The Upsetters– Dread Luck
B3 The Muskyteers– Kiddy-O
B4 The Upsetters– Wolf Man
B5 The Upsetters– Crying About You
B6 The Upsetters– Thunderball