In August 2020, Frogwares alleged that BigBen Interactive (now Nacon) used their "The Sinking City" IP inappropriately and terminated the contract and withdraw the game from download platforms, while communicating with their partners. In January 2021, the game was restored to stores by court order as the contract was terminated in a 'manifestly unlawful' manner. Frogwares had urged users not to purchase certain versions of "The Sinking City", such as the version that was returned to Steam, stating these versions were not created by them.