Decoupaging a Mug?
Decopauge is only paper and glue. I dont think you would have any trouble heating and washing it. Check the bottom of the mug, it should tell you if you can microwave it. Some mugs get too hot to handle, but they cool off quickly. Good luck!
Free Printout of Stratego?
Call or write the manufacter. Milton Bradley, if its their game, Im sure would send you the directions.