The story of the UK Version (First Edition) has been altered in the following way: there's no need to run over innocent pedestrians during the races to get more points. The altered story in the UK Release (First Edition) goes like this:
"The year is 2028. Solar flares have contaminated the atmosphere, turning 80% of the population into wandering crowds of evil zombies. It is an era of peace, where weapons are a forgotten thing of the past, mankind has only one option... to defend society, as it knows it, in cars. All pedestrians have been cleared from the streets. Carmageddon is our only hope..."
Several passages of the manual were blackened (big bars were printed over the passages of the manual that tells the actually story in the US Version), the story of the UK Version was told on two seperat sheets.