Greedfall looks like an epic game you would love to try with your friends and the common question asked is
“Is Greedfall a co-op or multiplayer game”
Sadly, Greedfall is a single-player RPG adventure so it is something you must undertake alone.
“Will, there be multiplayer in the future”, I hear you ask?
Sadly again there is no sign that any part of the game is going to have an online or offline co-op/multiplayer mode.