Fairly simple, you name a StarCraft strategy (as in massing something, using certain units for a specific purpose or ability, some type of rush, a drop, whatever, any kind of strategy you can think of) and someone else names a strategy which counters or prevents it. The next person after them names a strategy which counters or prevents that one. It just keeps going down the line, each person describing a new strategy which nullifies the one before it. Name the race you're using for the strategy, and what exactly your strategy is, plus how it counters/prevents the strategy above you. No one can use the exact same strategy someone else has (you can vary the units used to make it different though), so eventually you'll have to start getting creative. Now, as for my strategy, to start things off.. Zerg: I mass hydras, fill all of my overlords, and use them to do a huge-scale hydra drop at your mineral line.