Starship Defense is a tower defense game developed by Q-Games for DSiWare. It was published by Nintendo in 2009.
The game is similar to a tower defense version of Galaga. The waves of enemies appear on the top screen while the bottom screen displays the player's starship and weapons. Before each wave starts, the player sees the path the enemies will follow and get to place towers on the ships. Enemies drop currency which is used to build weapons and collecting them before the round finishes will earn bonuses. Some enemies will drop power-ups that rotate between power, speed and range. It will improve the stat of the tower it is dragged on to.