The main part of the Great Battle Series has been redesigned from the belt scroll action method used in the previous work " The Great Battle III ", and changed to the side view horizontal scroll action method. This allows each character to use the special abilities to capture the stage, further increasing the action element. 7 stages in all. Also, among the four characters in the previous work, all but the lore have been replaced.
The main weapon of each character is firearms, and there are levels. Raise up to 3 levels by placing a certain number of capsules placed on the stage or dropped by the enemy. In addition, you can use bombs to attack the entire screen and guards to prevent attacks. When two players play, you can move with one character on your back.
Source: Wikipedia, "ザ・グレイトバトルIV", available under the CC-BY-SA License.