Starcraft Remastered is an updated version of the classic strategy game released in the late 90s, announced by Blizzard in March 2017, featuring 4k resolution support, improved audio and support for the latest version of Battle.net, the service that has offered multiplayer for Blizzard games for nearly 20 years.
The exact release date is August 14th, and the game will set you back $15. Battle.net is the only place to buy and play the game. You can pre-order the game here. Right now, however, the original and the Brood War expansion are free.