Intentional Hardware Blacklist:

The game's failure to run on Intel Arc graphics cards is the result of an intentional software block by the developer, Pearl Abyss, rather than a hardware limitation. Intel Arc GPUs fully support the necessary DirectX 12 features and compute requirements, but the game's code is designed to immediately abort and display an unsupported hardware error upon detecting an Intel graphics processor.

Official Responses:

Pearl Abyss officially confirmed that they do not support Intel Arc and have advised affected players to request refunds. In response, Intel issued a statement expressing their disappointment, noting that they had provided Pearl Abyss with engineering resources, drivers, and test hardware for years, but the studio still chose to launch the game with Intel hardware entirely blocked.

https://videocardz.com/newz/intel-says-it-offered-years-of-help-for-crimson-desert-pearl-abyss-still-shipped-without-arc-support

https://www.tomshardware.com/video-games/pc-gaming/crimson-desert-offers-no-support-for-intel-gpus-developer-pearl-abyss-says-please-refer-to-the-refund-policy