While you are on the research screen press rctrl + F1. you will unlock everything on that research tree. Do it again for each tree you want to unlock. I'm not sure if it resets or not since I only tried it once.
Rumors speak of LCtrl + LShift + Tilde. That should enable you to use the developer's mode. Should give you unlimited resources and the ability to instant build with pressing the LCtrl while clicking on rush building. Doesn't work for me though, maybe cause of my QWERTZ keyboard
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