Crisis Force (クライシスフォース) is a vertical-scrolling shooting game released by Konami exclusively in Japan for the Family Computer on August 27, 1991. 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. The player controls one of two fighter ships piloted by Asuka and Maya, a pair of twin siblings descended from the ancient civilizations of Mu, who must save the world from a breed of artificial monsters from the lost civilization of Atlantis. The main feature of the game system is the player's ability to transform its ship in one of three different forms, each with its unique attack method.

The Datach (データック, Dētakku) or Datach Joint ROM System, was an add-on accessory by Bandai for the Family Computer and was released on December 29, 1992. It was packaged with one game, Dragon Ball Z: Gekitō Tenkaichi Budokai. Six other games that were released for it, including one of the last games for the Famicom system in 1994. It is one of two mini systems compatible with the NES/Famicom, the other being the Aladdin Deck Enhancer. The Datach consists of a cartridge connection at its bottom, a central cartridge chamber on its back, with two spring-loaded pins on either side, which are pushed up when the unit is inserted into the Famicom, allowing the game to only be removed when the Datach has been removed from the Famicom. Its main feature is the card reading slot on the front. The cartridges resemble half-size Famicom cartridges. One side of the cartridge is flat with title sticker, while the other side is sloped inward with notches on the left and right, which correspond to the spring pins on the main Datach unit. The cards that come with the games are swiped from left to right along the card slot; they are glossy on the front with an image of the character and the backs are smooth usually having the title of the game and barcode. All cartridges, boxes, instructions have the standard FF (Famicom Family) insignia, showing they are officially licensed by Nintendo.