You can do this in local games. Clash at Sea works best because you can attack many spots in a single turn.
Each fleet has carriers that allow you to attack many coordinates at once. Have the second player place their ships clumped together. Skip a few turns to build up your points, then unleash them on the second player.
The second player doesn't need to play at all. They can just press
to skip their turns. I do not believe that player 2 can earn any achievements.
