Engadget
The wildest video game budgets can't hold a candle to GTA 6

Analysts estimate Grand Theft Auto VI’s development budget at $1-$1.5 billion, surpassing both major Hollywood productions and other AAA titles. The cost reflects a decade-long development cycle, extensive staff across acting, writing, programming, animation and testing, plus anticipated online-mode support. Rockstar expects the single-player launch and subsequent GTA Online revenue to justify the unprecedented investment.