Dang it! I was trying 2 get the metal guy, I got the Tier II guy 2 b metal, but then the Tier III guy became beast! So 4 the Tier IV guy, I decided 2 wast as many red and green ores as possible. I got 50% 4 my metal, but it still became a beast!!!
This Tic-Tac-Toe strategy gets everyone I play with, including the CPU. You click the middle and he'll go to a corner, go the the diagonal of him so that his duck and your 2 ducks make a three-in-a-row. He'll then go somewhere, block him if he goest 2 a corner, if not, make a mini triangle with your ducks.