If you use UE4: You pay 20$ monthly, and 5% of your income.
If you use UDK: You have to buy a 90$ license, and then, when you earn 50 000$, you start paying 25% royalty.
If you use UE4: You pay 20$ monthly, and 5% of your income.
If you use UDK: You have to buy a 90$ license, and then, when you earn 50 000$, you start paying 25% royalty.