involved entering a black hole inside a carrier (the UGS Macarthur) equipped with a special device, allowing the player to enter an alternate dimension where this weapon is stored. It involves destroying the defence craft at the black hole, whilst protecting the UGS Macarthur. If successful, the UGS Macarthur enters the black hole to enter the alternate dimension. The second part of the mission involves launching the Nova Bomb at the star of the system inside the black hole. As the missile could be destroyed for up to 1 minute after launch (after which it entered hyperspace), it requires protection from assault by enemy craft. From this mission, three possible end-game sequences are possible: Mission failed - If at any point the craft the player is piloting is destroyed or disabled, or if the Macarthur is destroyed in the first part, or if the Nova Bomb is destroyed in the second part. This results in an end sequence where the aliens move the Doomsday device to Earth, and destroy it. Mission successful, Macarthur destroyed - If the Macarthur is destroyed during the second part of the mission, the player becomes trapped and cannot travel back through the black hole. The mission is a success, but all craft are lost. This resulted in an end sequence detailing a memorial service for all those lost. Mission successful outright - If the player succeeds in entering the black hole, launching the Nova Bomb, and returning to the Macarthur before the Nova Bomb reaches its destination, this results in an end sequence of the Macarthur returning to one of the X-COM bases with craft doing tricks around it, and fireworks being launched. Gameplay The game's main screen differs from previous incarnations of the series. The majority of the panel is taken up by a view of the planetary systems in The Frontier, represented as stars. However, the player can zoom into the stars to see all planets and bases located in those systems. Ship squadrons and anomalous events are also shown in this display. Located elsewhere on the main screen are links to all the various base and resource management screens. Early missions involve the detection and interception of an enemy squadron of fighters. The player responds to this, and upon the X-Com squadron intercepting the enemy craft, the game switches to the flight simulation. In this mode, the player pilots a craft along