내가 만든

that I made

→ 나
phrase Rare #32,324
that I made Used before a noun to describe something you made; the noun can sometimes be left understood from context.
KO: 이건 내가 만든 케이크야.
EN: This is a cake that I made.

내가 만든 놀이 니까

Because it’s a game I made.

— 로마 (2018)