It's hard not to include a game that has been referred to as the national sport of an entire country. StarCraft is a massive cultural phenomenon in South Korea, and still has a healthy competitive scene worldwide. StarCraft II: Wing of Liberty had a huge amount of expectation on its shoulders. How could Blizzard possibly hope to improve upon a game with such a colossal following? However, they somehow pulled it off, creating a game that kept the feel of the original StarCraft, while offering a completely different meta game. The online multiplayer, with its extensive league system and brilliant selection of custom modes, arguably makes up the meat of StarCraft II. However, it's a complete package, and the single-player campaign is also terrific. If you've only got time to get into one online RTS, make it StarCraft II.
