"B.C.'s Quest for Tires is a 1983 video game developed by Sydney Development Corp. and published by Sierra On-Line. It was released for the Commodore 64, Atari 8-bit, ColecoVision, ZX Spectrum, MSX, and Apple II, based on the comic strip B.C. by Johnny Hart. The name of the game is a play on the title of the contemporaneous film, Quest for Fire. In the game, the player controls the prehistoric cartoon character Thor riding on his unicycle. The goal of the game is to travel through the levels while avoiding the obstacles." Source: Wikipedia, "Quest_For_Tires," available under the CC-BY-SA License.