This is the 3352nd most frequent Korean word.
넥슨
Nexon: A South Korean video game company.
In this sentence, 넥슨 is used as a proper noun referring to a specific company name.
넥슨은 한국의 유명한 게임 회사입니다.
Nexon is a famous game company in Korea.
Here, 넥슨 refers to the brand name of the company as the publisher of the game.
나는 친구들과 넥슨에서 출시한 새로운 게임을 플레이했습니다.
I played a new game released by Nexon with my friends.
넥슨 is again used to represent the entity creating or publishing the games, which are being described.