YOU SAID:

I just won a game of among us.

INTO JAPANESE

私はちょうど私たちの間でのゲームに勝った。

BACK INTO ENGLISH

I just won the game among us.

INTO JAPANESE

僕は僕らの間で試合に勝っただけだ。

BACK INTO ENGLISH

I just won the game between us.

INTO JAPANESE

俺は俺たち同士の試合に勝っただけだ。

BACK INTO ENGLISH

I just won the game between us.