All Co-op Commanders are playable for free. However, most are capped at level 5 unless purchased, except for Raynor, Kerrigan, and Artanis, who are completely free.
While the base game is free, certain single-player expansions and cosmetic items still require a purchase through the official Battle.net Shop : StarCraft II skachat kliuch k starcraft 2
Since 2017, Blizzard Entertainment has made a significant portion of the game accessible without any purchase or product key: All Co-op Commanders are playable for free
Searching for a "key for StarCraft 2 " ( skachat kliuch k starcraft 2 ) is largely unnecessary today because . Many sites offering "free keys" or "key generators" are often fraudulent and may contain malware [Expert Consensus]. except for Raynor