https://www.gamespot.com/articles/new-pubg-savage-map-early-access-keys-giveaway/1100-6457856/

We're giving away 5,000 Early Access Keys for you to play PlayerUnknown's Battlegrounds' new map, Codename: Savage, on Steam. (Scroll down to enter below.)

Entry is open worldwide. The Early Access Key allows you to play the map even if you do not own PUBG. This is NOT an instant win. 5,000 winners will be chosen on Sunday, April 15 at 8:00 PM PT, and contacted via email.