There are at least 5 bands sharing this name: 1. American power metal band.
2. Hard rock/alternative/metal band formed in 1996.
3. Death/doom metal from Japan.
4. A bubbegum/glam band.
5. Straight edge parody band from 1989
(1) Grudge was an American power metal band formed in New York City, New York in 1984. They self-released the LP "Barbarians of the New Earth" in 1986. The band had possible ties to Lords Of The Crimson Alliance.