If you're a little behind on your real-time startegy gaming, there's still time to pick up the most important release of the last few years before its immediate successor launches. Blizzard is offering StarCraft 2: Wings of Liberty at 50% off up until expansion Heart of the Swarm launches on March 12. That's probably not long enough to master one of the premiere eSports of the current generation, but it will set you up to get on board the hype train next week. Wings of Liberty was focused on the Terran or human faction, which Heart of the Swarm is more centred on the Zerg. A third instalment is expected a couple of years down the track.