Alter Ego is a German acid house music group, comprising Roman Flügel and Jörn Elling Wuttke. They achieved notability in 2004 with their track "Rocker", which became one of the year's defining dance anthems, especially in Europe, and getting played on rotation amongst the most popular electroclash DJs such as Felix Da Housecat and 2 Many DJs. The track peaked at #32 in the UK Singles Chart.

In the 2004 Groove Magazine Readers Poll, Alter Ego won three categories, taking out the award for 'Best Single' for "Rocker", 'Best Album' for Transphormer, and also 'Best Live Act'. French group Black Strobe took out 'Best Remix' honours with their remix of "Rocker".

In 2005, Roman Flügel went onto produce the track "Gehts Noch", which was a worldwide hit, and was regularly played by many international DJs.