Worms Armageddon had two versions of the Wormsong included in the game. The main version, Wormsong '99, can be heard in the main menu playing in the background. The second version can be heard when viewing the statistics screen after a battle and letting the background music roll, but only in the PC version. This version has somewhat different lyrics spoken in a Scottish accent, similar to the Angry Scots soundbank available for the worms.
Wormsong '99 is the only Wormsong without a chorus, and is the only song that doesn't end with "WE'VE WON THE WAR!" This could be because it's the last wormsong chronologically, and the song in which Boggy B (the series' protagonist) supposedly dies.