Hydro Hopper was known as Ballistic Biscuit. On may 2006, the game was released on Club Penguin and the name was changed to Hydro Hopper. The rules are simple- you control your penguin with your mouse. Avoid objects such as:
Grab a life ring for an extra life. you have three lives when you start.
Fact: On RocketSnail.com, go onto the “Games” section, and you can play the original Ballistic Biscuit there.