You may think you’re something of a video games whizz. After a few minutes of button-bashing and mouse-waggling you’ll figure out any game, you like to think. No. Nope. Not with this. Love maker Eskil Steenberg has released a public test version of his next game, Exo (formerly Dark Side of the Moon), and you should read the helpful file named How_to_play.txt. Without it, you may not even twig that it’s a stealth RTS about heavily-armed exosuits hiding in shadows. I certainly didn’t.