the mechanic of space invaders where the invaders speed up where there were less of them? that was actually a hardware issue, when there were less invaders to draw, it took less time to draw the frame, giving the impression of the invaders speeding up and getting desperate. when they realized, they loved it so much they kept it, and started the trend of enemies “turning red” when near death. it’s funny to think that one bug has defined videogame enemies for generations.
What many people don’t know:
Bunnyhopping in Quake was actually a bug (source1, source2, source3, and many more), but the developers decided to keep it, because it was a really fun playstyle. Now think of Quake and the competitive scene without bunnyhopping?!