Merge to Battle is a battle game that relies on strategic maneuvers and merge mechanics to defend a castle and towers. The player guards a fortress on top of a mountain peak across from an enemy's castle that's on the other side of a green field and dirt road.
The player initially commands one structure and low-level blue stickmen knights. They merge two matching knights to create a more powerful one to fight enemy soldiers that appear on the road. The knight then proceeds to attack the enemy's stronghold. They receive coins every time their knight wins a fight. Each fortress has five lives attached to it. The player's goal is to diminish those lives before the game's AI can do so with opposing forces.
Eventually, Merge to Battle provides the player with more than enough money, from coins that convert into valuable crystals, to level up and repeatedly merge knights, expand their army to merge-capable archers, upgrade the castle, and install towers for the archers. Since the enemy's forces move quickly down the road, the player must position, or merge and position, their forces rapidly as well inside of a white-line barrier that appears around the keep.
