Ark: Survival Evolved (stylized as ?RK) is an action-adventure survival video game developed by Studio Wildcard, in collaboration with Instinct Games, Efecto Studios, and Virtual Basement. It was released in August 2017 for PlayStation 4, Xbox One, Microsoft Windows, OS X and Linux, with versions for Android, iOS, and Nintendo Switch in 2018. In the game, players must survive being stranded on an island filled with roaming dinosaurs and other prehistoric animals, natural hazards, and potentially hostile human players. The game is played from either a third-person or first-person perspective and its open world is navigated on foot or by riding a prehistoric animal. Players can use firearms and improvised weapons to defend against hostile humans and creatures, with the ability to build bases as defense on the ground and on some creatures. The game has both single-player and multiplayer options. Multiplayer allows the option to form tribes of members in a server. The max number of tribe mates varies from each server. In this mode all tamed dinosaurs and building structures are usually shared between the members. There is a PVE mode where players cannot fight each other.