https://www.polygon.com/2018/4/3/17192770/playerunknowns-battlegrounds-pubg-savage-map-4x4-review-strategies-tips

Last night the latest map for PlayerUnknown’s Battlegrounds dropped on a new, invite-only test server. It’s smaller by far than either of the two maps already released for the game, but it sacrifices nothing. In fact, it’s a dense playground that will appeal to hardcore players and skilled teams alike.

The map is called Codename: Savage for now, and it’s Battlegrounds’ first 4 km by 4 km map. Both of the previous maps were 8 km on a side, but that’s not the only difference.