The Sega Genesis game Waterworld is a platformer that follows the adventures of a group of friends who travel to different worlds in order to save the world from a watery disaster. The game borrows heavily from the classic Super Mario Bros. game, with players controlling the characters as they navigate their way through various levels. The graphics are colorful and detailed, and the gameplay is very smooth and responsive. The sound is also very catchy and entertaining, and makes for a great addition to any gaming experience.