All content on the Unreal Wiki is licensed under the Creative Commons Attribution Noncommercial ShareAlike 3.0 license. When you add content, you are agreeing to use this license. If you are adding content which you are not the original author of, it must be licensed under compatible terms. Content that falls under wp:fair use laws can also be added. Copyright is still always maintained by the original author.
There is one exception to this rule. All content in the Legacy namespace or images in the Legacy images category fall under the old Unreal Wiki's license. New content cannot be added using this license.