Complex sentence: In September 2008 Walkers introduced a Mega Monster Munch range based on the original Monster Munch from the Smiths days, including three of the original four monsters.
Split into simpler sentences: In September 2008 Walkers introduced a Mega Monster Munch range based on the original Monster Munch from the Smiths days. The packs include retro designs, based on the original packs, featuring three of the original four monsters.