Killer Octopus is one of the many skins released in the monthly Predator Skin Collection. It could be purchased as part of an item deal in early June 2020.
Killer Octopus could be purchased for $4.99 in a limited time deal which included three 1 Hour Mass Boosts (3x) and three 1 Hour XP Boosts (3x). It was not available for individual purchase and may not be available for purchase in the future.
Details of this skin may vary depending on location, platform or time.
Note: This edition of the Predator Skin Collection was released again for a limited time in mid April 2021. The price and included game boosts for Killer Octopus remained the same for this release.