For legal reasons, many changes were performed in later versions of the game. Only the Terminator was spared any alterations.
The game came out as version 1.00 in the US and Japan. Later, version 1.01 was released in the USA. Europe received version 1.02. The two collections Mega Games 2 (Europe) and Sega Classics Arcade Collection (USA) each contain version 1.03. Version 1.04 was released in the Wii store.
