The regulator said a high-risk player kept depositing for more than a year before NorthStar intervened, while the company said it has since overhauled compliance.
The regulator said prohibited functionality slipped into multiple slot titles for months before a compliance check caught it.
The regulator said nine people under 19 were able to deposit and gamble, while 14 others opened accounts only.
The regulator said the casino operator missed warning signs, skipped required reports and left high-risk patrons without enough scrutiny.
The regulator said 40 bill-validator installations bypassed testing and approval rules designed to protect gaming integrity.