noun
Refers to a person who designs video games, including mechanics, levels, and systems. The term is a direct loan from English and is used in the same professional sense.
彼は大手ゲーム会社のゲームデザイナーです。
He is a game designer at a major game company.
ゲームデザイナーになるには、プログラミングの知識も必要
To become a game designer, programming knowledge is also necessary.