REUTERS: CD Projekt has become a target of cyber attack, which compromised some of its internal systems, the Polish video game maker said on Twitter on Tuesday.
"An unidentified actor gained unauthorized access to our internal network, collected certain data belonging to CD PROJEKT capital group, and left a ransom note," it said in a statement.
The company's shares dropped 6per cent by to 270 zlotys (US$72.79) by 0841 GMT.
CD Projekt added it was still investigating the incident but to the best of its knowledge, the compromised systems did not contain any personal data of its players or users of its services.
CD Projekt has been in the limelight recently amid the troubled roll-out of its long-awaited Cyberpunk 2077 game.
The company said it will closely cooperate with authorities to fully investigate this incident.
(US$1 = 3.7092 zlotys)
(Reporting by Anna Pruchnicka in Gdansk; Editing by Jason Neely and Tomasz Janowski)