The developer should provide a game age rating for each game using the simple automated survey provided by ONE store.
If the game is rated as Adult, additional approval from the GRAC (Game Rating and Administration Committee) is necessary. GRAC has a website in English where you can apply on your own, without needing any local legal person to represent you. You can also access this Google support page for resources on the GRAC certificate application.
You may not register games that may violate the laws, rules, or regulations of South Korea. Adult-only games must be rated by the South Korean government. Please check with the Game Rating & Administration Committee (GRAC) for more details.
The Terms of Services of the ONE store Developer Center state that a developer must not infringe on another’s intellectual property rights. If a property owner reports that a product is being sold without their permission, ONE store will suspend all sales of that product immediately.
Sales are calculated monthly starting the 1st of the month, and amounts are finalized by the 15th day of following month.
International sellers need to submit a payment request. You can request a payment when the total cumulative amount is more than 100,000 KRW; the form is available on the ONE store Developer Center from the 15th to the 25th of the month following the month for which payment is being requested. The payment is made at the end of that month.
For overseas developers, a Korean bank account is not necessary. However, to verify the bank account, you are required to send a copy of your bank account statement and your ONE store Developer Center ID to firstname.lastname@example.org.
Payments are in South Korean Won (KRW) only. You can find more details about payments here.