These newly released Gamma Islands are reworked from the ground up from their original format, with reconsidered rules, tactics, and metas to make the content fun, fair, scalable, and important to the game’s wider world. The Gamma Islands have also expanded in number, with a total of 40 islands set to release. These 40 islands all have different tier levels, with benefits and tradeoffs in terms of material, tech level support, and map placement.
Content retrieved from: https://massivelyop.com/2021/10/29/open-perpetuum-reworks-the-gamma-islands-area-and-outlines-a-three-phase-release-schedule/.