Complex sentence: The game was based on the Nickelodeon cartoon Ren and Stimpy; while several Ren and Stimpy games were made for multiple game platforms, this particular game was only created for the Game Gear.
Split into simpler sentences: The game was based on the Nickelodeon cartoon "The Ren and Stimpy Show". While several games featuring Ren and Stimpy were made for multiple game platforms, this particular game was only created for the Game Gear.