The problem isn't the formula (good enough game, readily accessible, noticed by players.) The problem is that last step, "be noticed", is extremely hard and mo

The problem isn't the formula (good enough game, readily accessible, noticed by players.) The problem is that last step, "be noticed", is extremely hard and mostly based on luck/money. And this is 100% "long-term repeatable" if you can continually deliver "good enough" games after being noticed. The obvious example is Call of Duty.