To talk about StarCraft: Ghost we have to go back to the Tokyo Game Show of 2002, in that year the game for Xbox and PS2 was announced. Title was being developed by Nihilistic Software. The years went by and the development passed to Swingin ’Ape Studios in 2004. By then, the game had been in development for four years. And although it was announced in 2002, the project began two years earlier.
The years went by and there was no new news regarding StarCraft: Ghost. Finally, Blizzard decided to cancel the game's development in 2014. Now, in the middle of 2020, they have leaked a playable version of StarCraft: Ghost for Xbox. On YoTube, many gameplays have been released overnight. Then you can watch one of these videos.
According Kotaku, the game was present in a development kit of the first Xbox, that's where they got the game. It is not a full version since the development of StarCraft: Ghost was never completed. Only six missions are available. In addition, it is not optimized and there are many bugs