Hercules is one of the three skins released under the Champions of Olympus part of the Olympus offer. It could be individually purchased with game coins in early September 2017.
Hercules could be purchased in the Skins Shop under the 'Olympus' tab for 490 coins. This skin was available for a limited time and may not be available for purchase in the future.
Details of this skin can vary depending on location, platform or time.
Note: The Champions of Olympus sub-offer was released again for limited times in early March 2019, mid July 2021 and then in early October 2021. The price for Hercules remained at 490 coins for each of these releases.