I'm gonna make two. This one is my semi silly one. I think I'm gonna write a more serious one tomorrow. (at least I plan to...)
During the 22nd century, a scientist developed a program to allow people to tie themselves into a game.
The game gained a lot of popularity, as people would fight to settle decisions. Very quickly, governments started taking interest in these games. They redesigned the game so that players that would die in-game would die in real life. The first war to be fought in-game was the 2160 Peninsula War.
As more people died in the game though, the program began to change. The cubes became alive, as if the souls of the ones who have passed, were still fighting on.
The cubes fight to this day.
The exact reasons why the cubes still fight, is unknown, but it is as if the ghosts don't know any different.