Crisis Force is an overhead shooter from Konami released in 1991 solely in Japan. The game features seven stages and allows the player to change ship configurations on the fly. As Konami's final shooting game for the Famicom, the game was developed to push the hardware's specifications to its limits and utilized Konami's custom VRC4 chip (previously used for the Famicom version of Gradius II) to allow for four-way scrolling and large bosses. However, because of the game's late release during the Famicom's lifespan, a year after the launch of its successor the Super Famicom, Crisis Force did not achieve the popularity that Konami expected.