Mission Control
Legend has it (and i've heard it from a friend of a friend so this could well be complete BS) that a certain ESA satellite programme had mission control playing a modified networked version of DOOM on all the big screens played by the various system controllers, with some cleverly coded interrupts which would immediately pause the game and bring the satellite monitors back up on any alert that manifested itself on the system and required intervention from any one of them.
I was told that typically, this was an environment where you'd get 5 minutes of intense activity required followed by hours of nothing happening until another alert, so they had plenty of time to amuse themselves between events.
Biting the hand that feeds IT
