Tim Schafer's heavy metal RPG/RTS hybrid was that strange animal: A new IP that wasn't really like anything else before or since. It features the voice acting talents of Jack Black as heavy metal roadie Eddie Riggs. Transported into another dimension by an on-stage accident, Riggs helps liberate the people there using a guitar that casts magic spells and a massive axe. After you do enough action-RPG questing, you'll face huge hordes of enemies that you have to eliminate in RTS-style battles. This mix of genres wasn't a huge hit when the game released, but if you buy in, the experience is quite fun. Add in the stellar cast of voice actors (Lemmy Kilmister, Rob Halford, Ozzy Osbourne and Lita Ford, to name a few), and you've got an awesome heavy-metal themed experience that's completely worth checking out.