You will not have much possible choices how to improve your career, at certain levels you can't advance unless you are Korean (or probably fit yourself in Korean culture and be fluent in Korean). Rarely any position in lower to medium management is filled in by non-Koreans, so if you want to advance in your career you will be required to switch the company sooner or later.
There is the Luxembourgian working law the company has to follow (Nexon Europe), but in my work years the law has been broken several times. If you don't behave as they like you get nicely told "If you have a problem, you can go."
The goals the company sets are unrealistic, it creates pressure on the employees, it increases the stress level and leads to mismanagement which leads to more stress. If you are with your full heart into a project it may be in personal conflict with you since if you understand something of proper management you will see that the work way can not succeed -> very demotivating.
Also the outlook is not positive, I do not think that the top management and the CEO who are all Korean by the way understand much of games and western culture and this leads to many wrong decisions.
Since the pressure is high and the game teams understaffed due budget cuts it's not possible to work in creative ways, find new possibilities and bring in yourself at your best. Even I work in actually a very lively industry where single persons and ideas matter, I feel like a robot at work.
