Guerrilla Games, makers of the Horizon series of open-world, post-apocalyptic adventures for PlayStation, is working on a “separate Online Project” set in that series’ universe, the studio said in a tweet Friday morning.

Guerrilla shared the news in an open call for designers to apply for the studio’s “Single-Player (SP), Online Project (OP), and External Project (EP) teams.” The studio needs three dozen developers for those three teams, including lead designers for combat, systems, and quests, plus a narrative designer and principal writer, for the Horizon online project.