Merge Defense 3D is an easy to play but challenging tower defense game with numbers! Train your brain with calculating and multiplying, think ahead by counting and making predictions, merge to become stronger, enjoy the interesting concept and addictive gameplay. Make the time fly with this merge and tower defense game! How to play: • Place defenders on the board to shoot enemies • Merge two defenders with the same numbers to upgrade its power • Collect Keys to get more defenders • Colle