StarCraft II is free-to-play, you can download the game client from the StarCraft II Official Game Site.
You need to have StarCraft II installed in order to play the Mod. StarCraft: Mass Recall contains 68 maps, 59 from the original StarCraft/Brood War game, 3 that were hidden or deleted on various StarCraft supports, and 6 from the 1998 demo campaign.
StarCraft: Mass Recall (SCMR) is a project that recreates the classic StarCraft and Brood War gameplay as well as the entire single-player campaigns within the StarCraft II engine.
