Thanks for advices, I will try that ways. Im using UE4
https://docs.unrealengine.com/en-US/TestingAndOptimization/PerformanceAndProfili...
Did you enable shared material shaders shared material library code?
Did you remove the prerequisites etc?
Did you remove unused plugins?
There's lots of things you can do to reduce the game size, depending on your game of course there is a limit. All we know so far is that it is 2.5GB and Unreal Engine.
Doing these three will likely remove about 100-200 MB, still above target but closer. Make absolutely sure that you are only packaging maps that you need and I expect that would take care of the rest.