YOU SAID:

I've played in his game music room a couple of times before

INTO JAPANESE

彼のゲームミュージックルームで数回プレイしたことがあります

BACK INTO ENGLISH

Have played several times in his game music room

INTO JAPANESE

ゲーム音楽室で数回プレイしたことがある

BACK INTO ENGLISH

Have played several times in the game music room

INTO JAPANESE

ゲーム音楽室で数回プレイしたことがある

BACK INTO ENGLISH

Have played several times in the game music room