Boss Rush is a mode that puts the player's ship of choose against all Super ships in Warship Gunner 2 with a few being fought twice.
Boss Rush is an extremely difficult game mode that puts the player with whatever ship they have designed against all of the known super ships. This serves as a special challenge for the player to achieve, though all odds depend of the type of ship and weapons. The quickest and easiest way to beat this mode is with an end game style ship with play through 2 level weapons such as a Wave Gun, high caliber Artillery, as well as high level defense systems mounted on a max level battleship (Recommended ship, Japanese type). Completing this challenge can take a few hours. The only downside to this mode is that the player has only one life and if destroyed will fail the rush regardless of how far they have completed and will have to start all over again.