1. Outbreak (American band)
- Formed in the early 1990s in Sacramento, California
- Genre: Funk rock, rap metal
- Notable albums: "Ugly," "Outbreak," "Outrageous," "Freedom Pop," "Rebirth"
2. Outbreak (British electronic music duo)
- Formed in 2004 in the United Kingdom
- Genre: Trance, techno
- Notable albums: "Outbreak: Tranceport," "Outbreak: Tranceport Two"
3. Outbreak (Polish death metal band)
- Formed in 2003 in Opole, Poland
- Genre: Death metal, groove metal, thrash metal
- Notable albums: "Endless Darkness," "Insomnia," "Pandemonium," "The Machinist"
4. Outbreak (American metalcore band)
- Formed in 2004 in Pittsburgh, Pennsylvania
- Genre: Metalcore, hardcore punk, post-hardcore
- Notable albums: "Life After Death," "Rise From The Dead," "Ascendancy"
5. Outbreak (German rock band)
- Formed in 2001 in Berlin, Germany
- Genre: Rock, punk rock, alternative rock
- Notable albums: "Outbreak," "Second Time Around," "The Revolution Will Be Televised," "The Art Of Breaking Away"
Please note that there may be other bands or music groups that use the name Outbreak, and the list above is not exhaustive.