Now, player B will have to constantly reproduce new battleships once they are destroyed. The AI should eventually be able to take out the battleships and shouldn't really require anymore interactions from the player (I had mine in the points screen so I know how much I need to get to a certain level). Position the LSMs in such a way that it can effectively see 2-3 battleships. Give it a little leeway and avoid hitting less than 3km as the battleships will be within range to hit the LSMs. The rocket ships should be on average 3.1-3.7km away from the spawned battleships. Player A will split the rocket ships into three groups and each group will position around player B's shipyard. When the match starts the person going for the achievement (player A) will build all rocket ships (LSMs - Rocket) while the other player (player B) will build all battleships (BBs). Island Capture, Swirl, Medium size, disable time and capture point limit. This can be boosted in a couple sessions with another partner (if double-boxing it then it would probably take overnight).