In the game of Rock, Paper, Scissors, each choice has a counter choice that thoroughly defeats it. If you knew that your opponent was going to reveal a scissors

In the game of Rock, Paper, Scissors, each choice has a counter choice that thoroughly defeats it. If you knew that your opponent was going to reveal a scissors, you would counter with a rock. In Star Craft, each unit has opposing units that are extra effective against it, so if your opponent had a bunch of marines, you might build a bunch of siege tanks. Here's a whole article on counters to the marine unit: https://osirissc2guide.com/marine-counter.html https://osirissc2guide.com/marine-counter.html