For the past three years have been marked by a yearly release of an Underground Compilation CD. And each CD has been populated by some of the best music that Hong Kong's nascent indie music scene has to offer. Each CD features 11/12 bands, carefully handpicked from the landscape, performing two of their best, original songs. The result is an effective snapshot, frozen for posterity, of various bands as they fit into the music scene at the time, and provides an idea of the staggering breadth of music being created locally as well.

為何有此警告？過去三年Underground HK 皆推出年度的Underground Compilation CD，於萌芽中的本地獨立音樂圈中集結最出色的音樂單位，每張大碟均集合了十一至十二支本地樂隊，大碟內每支樂隊的兩首原創歌曲都是精挑細選的佳作。
Underground Compilation CD系列正好反映出當代本地樂隊的面貌，令更多人欣賞本地樂隊豐富的創意，留住了每代樂潮的最好一刻。

Underground Compilation CD#4 is due to be released in April 2011, and the bands are currently in the process of recording their songs at Mark 1 Music Centre. The CD promises to be a thrilling one, with genres ranging from electronic, to various formulations of punk, to bluesy and jazzy and funky rock. After holding the bastion of live shows through the various Underground showcases, and 3 compilations, CD#4 is yet another step forward for The Underground's contribution to the progress in indie music. The release will also be marked by the traditional blow-out release parties, so it'll be terrific fun to add to the exciting music.