EG:rRootage is one of Cho's finest (and oldest) games, a vertical one-screen shooter with tons of levels and four distinct game modes, and while modes can often seem like little bonuses in shmups, in rRootage they're the whole focus. The core of the game is boss fights. Every level is one giant ship at the top of the screen and your ship at the bottom, which is in fact just a hitbox with a shell. The boss ship fires a pile of bullets, and will change form several times throughout each stage, which also varies up the shooting patterns. And there's one tiny, crucial other detail: the closer you are, the more damage you do.