A strange little side quest
One reason space keeps producing good game ideas around Classic Tetrix is that its history is full of strange turns. The Moon orbits Earth at an average distance of about 385,000 kilometres, and surface gravity there is roughly one-sixth as strong as Earth's. And then there is this: Street Fighter II, released in 1991, turned head-to-head arcade fighting into a worldwide phenomenon and helped define the modern fighting-game genre. Not bad for a few facts hiding behind a Play button.
