Friends confer an XP benefit when working together in fortresses and there are some achievements for registering friends.
Other than that friends are more comparable to fitbit friends to encourage you to keep working against the Calamity while the ministry struggles to find a way to end it.
Friends can help you take down fortresses. At the 5th chamber I was stuck, unable to advance. I teamed up with someone 4 levels below me and we were abke to pass the 5th chamber on our 1st try. You get more charms to use with multiple players. If you use them right you can severely weaken your opponents and get through quicker.
Answers
Friends confer an XP benefit when working together in fortresses and there are some achievements for registering friends.
Other than that friends are more comparable to fitbit friends to encourage you to keep working against the Calamity while the ministry struggles to find a way to end it.
Friends can help you take down fortresses. At the 5th chamber I was stuck, unable to advance. I teamed up with someone 4 levels below me and we were abke to pass the 5th chamber on our 1st try. You get more charms to use with multiple players. If you use them right you can severely weaken your opponents and get through quicker.