Starcraft 2: Wings of Liberty was released on the 27th July three years ago, and Blizzard is celebrating by unlocking all three races (Human, Zerg, Protoss, natch) for the free-to-play Starter Edition.
For owners of the full game, the dev blog "For a limited time, we’ve increased the XP gains you get when you play StarCraft II by 25%. It’s the perfect time to log in and play some Multiplayer, or Versus A.I., or Training Mode games. Perhaps you’d like to level up the race you play the least often. Now’s the time!",
And yet, Legacy of the Void still hasn't been released yet after three years.