Andrew Gregory Sega (/ˈsiːɡə/ SEE-gə; born May 20, 1975), also known as Necros, is an American musician best known for tracking modules in the 1990s demoscene as well as for composing music for several well-known video games. He was a member of the synthpop duo Iris from 2001 until its disbandment in 2021. In 2020, he founded the dark wave duo Hallowed Hearts. Sega is the owner of the independent record label Diffusion Records. His main solo project is known as The Alpha Conspiracy.