Sony Interactive Entertainment and Shift Up, the developer of the game 'Stellar Blade', are being sued by a Louisiana-based film production company named Stellarblade. The lawsuit alleges trademark infringement, claiming that the use of the name 'Stellar Blade' for the game is damaging Stellarblade's business and online visibility. The film company asserts that the trademarks are 'confusingly similar'. The lawsuit also involves PlayStation.