How to make a new game mode

The ARK engine Is really different from others, I can’t find the basic Blueprints like GameMode,PlayerController,Pawn,Player State…
What can I do with the Mod now, I can do nothing!
I can only make maps???That is too stupid!

There are functions like getPlayerController and so on. Just do a right click inside the visual graph and search. If you can’t find it, then try to untick sensitive (upper right when right click box apears)