Andrew Sega (born 20 May 1975), also known by the pseudonym Necros, is a musician best known for tracking modules in the demo scene in the 1990s.

Later in his career, he started making music for games, beginning with little known titles such as In Pursuit of Greed, Iron Seed and Xixit, then moving on to Origin Systems' Crusader series. Andrew Sega was a founding member of the video game music production company Straylight Productions, contributing tracks to the first-person shooters Unreal and Unreal Tournament. After that, he joined Digital Anvil (now a part of Microsoft Game Studios) and worked as a programmer and musician on Freelancer.

Currently he runs own recording label called Diffusion Records and also releases music under the moniker The Alpha Conspiracy. In 2001 he became member of Synthpop group Iris.