Merge Defense is an interesting casual tower defense game. In the game, players need to buy different soldiers to build a defense line and resist the attack of zombies. The unique feature of the game is that when you have six identical soldiers, you can combine them into a higher-level soldier, thus enhancing the combat effectiveness of the defense line. The game is easy to operate, with a relaxed and cute art style, suitable for players of all ages to play in their leisure time and enjoy the fun brought by strategy and combination.