● Friends play
Two people who are nearby play a game using communication.
Communication is performed using Bluetooth or Wi-Fi.
You can not play on the Internet.
● Computer match
Play against the computer.
● Battle procedure
After establishing communication, decide the first or second attack, and place 5 battleships within 1 minute. The battle will attack each other within 30 seconds, and it will be lost if the five battleships first sink.