Peak is a climbing adventure game that allows players to team up for a lighthearted experience. The game accommodates multiple players, but as the number of participants increases, players must share resources, which does not scale with the group size. This requires strategic planning to ensure everyone is prepared for the challenges ahead. Players can invite friends by using an "invite kiosk" at the airport at the game's start, which brings up their Steam friends list. If friends are already in the game, players can join their session using the Steam overlay, but only while they are still at the airport. If friends leave without them, they must wait for the friends to fail their expedition before they can join for the next climb.