Troizina is a 4v4 ladder map for StarCraft II, introduced in Season 1, 2018. It was re-added in Season 3, 2019.
The main base is shared but there are four small ramp entrances to the area. Work together with your allies to keep an eye on enemy forces at the various openings. Also, coordinate your attacks against multiple ramps at once or consolidate your efforts into one area for victory.