Saints Row: The Third Online Review

: The game features a full campaign co-op mode, allowing two players to play through the entire story together.

: Ensure your friend is added to your list in the Epic Games Launcher before starting the game. Saints Row: The Third Online

If you are playing the modern version on PC (e.g., via the Epic Games Store), follow these steps to join a friend: : The game features a full campaign co-op

: Check the Saints Row Wiki for a deep dive into multiplayer mechanics. via the Epic Games Store)