Mayhem in Monsterland, released in 1993, was a game produced for the Commodore 64 home computer. Its titular hero, "Mayhem", was a yellow triceratops blessed with the gift of speed. His goal was to return his world from sad to happy, ridding the world of monsters along the way. The game featured effects not previously thought possible on eight-bit computers, and was the first C64 title to have a real feeling of speed, a "console-esque" feature the developers wanted.
The retro publisher Psytronik made an anniversary edition in 2008.
John Rowlands: Design and programme
Steve Rowlands: Design, graphics, music, sound
Source: Wikipedia, "Mayhem In Monsterland", available under the CC-BY-SA License.