"To celebrate StarCraft HD, Blizzard is somewhat generously giving away the original for free. StarCraft and Brood War will both be free to download once patch 1.18 is rolled out on March 30. Once the update is live, StarCraft Anthology, which includes the original game and the Brood War expansion, will be free to download and play."
Credit to HUKD
Oooh, nice! Thank you TA!