Coming to Uncharted 4 is a new Survival Co-op mode where you and two friends must face off against hordes of new enemies.
Survival is a wave-based mode where you and up to two additional friends can take on swarms of increasingly powerful enemies and unique objectives. From new enemy types and powerful new bosses to a dedicated progression system and expansive upgradable arsenal, Survival is all about strategy, camaraderie, and skill.
This update will be coming to Uncharted 4 in December. While the exact day, and whether it will be free or not, is unknown we will update this post when the news becomes available.