The free to play Warframe has built up quite the community in the years it has been running, keeping things fresh with frequent updates that add new elements to the game. However the Warframe team is set to unleash one of its biggest changes to the game in a long time thanks to the Plains of Eidolon expansion, which was announced this weekend.
The Plains of Eidolon will be an open world area with its own outpost where NPCs live, and where missions can be found. The plains themselves will hold mission areas allowing for up to four players to team up and tackle them. In the more social and open spaces up to 50 players will be able to interact with each other. The Plains will have a day and night cycle with different points of time changing what lurks in the world.
Warframe: Plains of Eidolon will be releasing later this year.
Source: PS Blog