RetroAchievements Mastery #8: Battle Shark (Arcade). I actually played this game on a legit cabinet back when I was in, like elementary school. The actual cab has a periscope you look through to aim your torpedoes. It's pretty cool. And this one was a relatively easy mastery, since it didn't have 1CCs to worry about. I'm happy that this was such a fun game to play through!