Klax ROM Download for Gameboy Color (GBC) on Emulator Games. Play Klax game that is available in the United States of America (USA) version only on this website. Klax is a Gameboy Color emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Marble Madness & Klax, Klax (1990) and 2 In 1 - Marble Madness & Klax (sUppLeX) as shown below. Klax works on all your devices in high quality.