There are at least two artists known as Tunnel Rats: 1) Tunnel Rats are a California-based underground rap collective formed in 1993, particularly known for challenging the conventions of commercial hip-hop. The group's original approach to rhyming, beat-making, and songwriting made it well-known on the west coast, and amongst fans of hip-hop with a Christian or biblical worldview. They've appeared on albums by artists such as Mars III, DJ Maj, Coalition