It really depends on your price point and the game. But assuming very small with little prelaunch marketing you really need to focus on getting on the new & trending list at launch. How do you do that?

You want a lot of people to buy the game quickly at launch. The best way to do that is building up wishlists prelaunch. That has organic second order effects that are helpful, but there are other ways to get lots of sales at launch...

https://www.forbes.com/sites/siladityaray/2020/12/04/report-...