>>715327759The game was designed to be played in groups. It requires you to play in a group without abandoning any members. It's not that you can't play if someone loses stamina or faints, but trying to level up with your entire team adds a lot to the game, and there's little point in managing food and equipment for a single player. Playing alone is more of a challenge to earn a badge.
Convince your friends or wait for someone to create a mod or something similar.