The Nemean Lion is a monstrous lion, the son of Typhon and Echidna. The Nemean Lion lived around Nemea and made the life in the valleys nearby dangerous. It played a role in one of Hercules' labors; Hercules was told to kill it. Since it could not be harmed by any weapon, Hercules suffocated it to death. From its body Hercules took its skull as a helmet and from its skin he made a mantle.
The Nemean Lion is briefly seen on a carving that Kratos ran on with the Boots of Hermes. It showed Hercules wrestling with the creature while Zeus and Hera watched, and the second half were Hercules offers his father the corpse of the Nemean Lion. The Nemean Lion's physical look on the carving showed that its size rivaled that of Hercules' and its tail was that of a scorpion. Hercules' weapon, the Nemean Cestus were named after the beast. The lion's defeat was briefly mentioned by Hercules before he fought Kratos, Hercules claimed it to be the only labor worthy of him.
It is possible that the carving of the Nemean Lion is actually a carving of a Manticore as it has a scorpion tail. If this was the case then the warrior battling it would not be Hercules as he did not kill or even fight the beast.
The Piraeus Lion bears many similarities to the Nemean Lion, however the former was killed by Kratos and not Hercules.