Various Sony Interactive Entertainment studios have helped create Death Stranding including 70 people from Guerrilla Games and a few people from Insomniac Games and Bend Studio.
While Guerrilla Games has multiple people credited, Bend Studio and Insomniac Games don’t have anyone credited but the studio name, claiming their “support” studios.
This production is quite literally insane, and it explains why it was made so quickly with so many people on board. Over half of Kojima Productions’ staff was made up of ex-Metal Gear staff, so Kojima is familiar with his staff which also helps production work quite smoothly.
Death Stranding launches on November 8th, 2019 with a PC release in Q2 2020.