In the original Space Invaders, the fact that the aliens started moving faster the more of them you shot was actually a bug. On the monitor, the screen refresh rate was linked directly to how many graphics were on the screen at the time - so the fewer aliens there were, the faster it was to draw them, and the faster they moved.

Pac-Man was originally called Puck-Man, from the Japanese word "paku", which means to open and close one's mouth. The name was changed for fear that when the game was released in the US, pesky teenagers would find it entertaining to amend one of the letters and create a more amusing name. Can you guess what that word was, kids?

The first video game death was in 1981, when 19-year-old Jeff Dailey died of a heart attack while playing Berzerk. This isn't the only death to have occurred while playing this game, either: 18-year-old gamer Peter Burkowski managed to get himself in the high score table twice in 15 minutes and then promptly collapsed.