It’s really happening. The StarCraft II: Wings of Liberty campaign, ranked multiplayer ladder, and Co-Op Commanders will soon be available for everyone for free.
Starcraft 2 Dev On The Effects Of Going Free-To-Play - GameSpot
The Very Beginning » Learning SC2
Blizzard Makes StarCraft 2 Free to Play, Learn How to Get It
StarCraft II will be free to play starting November 14
StarCraft II Free to Play: Legacy (Full Version)
StarCraft II: Free to Play Overview
Blizzard is handing StarCraft esports back over to third party
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StarCraft II Official Game Site
StarCraft 2 Becomes Free-to-Play Starting November 14
StarCraft II: Wings of Liberty — Вікіпедія
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