Many inventors of games (both board games and computer games) have indeed That's all spelled out on the website of the U.S. Patent and Trademark Office; but doing so will increase the total cost of the application process from a couple.
The filing fee for a provisional application is a fraction of the fee for a nonprovisional application. You could file the provisional patent yourself.
Disclaimer: I'm not particularly familiar with non-US patent law, so this will only focus . Generally, a patent application is a considerable investment. Since a gaming app is generally marketed not only within one jurisdiction.