YOU SAID:

He's playing video games without me.

INTO JAPANESE

彼は私なしでビデオゲームをしています。

BACK INTO ENGLISH

He is without me to video games.

INTO JAPANESE

彼は私がいなくてもビデオゲームをやっています。

BACK INTO ENGLISH

He is playing video games without me.

INTO JAPANESE

彼は私なしでビデオゲームをしています。

BACK INTO ENGLISH

He is playing video games without me.