The original version released in Japan (under the "I Love..." label) is slightly different from later versions released in Japan and Europe. Changes include:
- Blue Konami splash screen (instead of black)
- Fixed "KEYBOARD" spelling mistake on title screen
- Konami logo uses a different font
- Map of south pole is in English
- You start at a different point on the map (first region is the USA instead of Australia)
The version released as part of the Konami Games Collection 1 has further been enhanced with optional support for a SCC+ Sound Cartridge.