I’m making a game in Korea by myself
From Fab’s license
Creative Commons can be used freely if you mark the copyright holder
And I wonder if the standard license can be used freely without any conditions
a. License Grant. A “Standard License” grants you a non-exclusive and non-transferable license to privately use, reproduce, display, perform, and modify the Content in accordance with the terms of this Agreement. This means that as long as you are not violating this Agreement, such as by using the Content in violation of any applicable law or regulation or for any unlawful purpose, you can privately use the Content however you want under a Standard License. If you want to share the Content or anything you make with it, Sections 4 and 5 address when and how you can do that.
from Fab EULA : https://www.fab.com/eula