From GameWatcher: “Shadow of the Tomb Raider is out tomorrow, and you may be playing it already if you bought the Croft Edition. It’s also excellent, and well worth picking up. It’s a sizeable adventure for sure, but is it only single-player? Is there Shadow of the Tomb Raider co-op? Or Shadow of the Tomb Raider multiplayer modes?”
Source: N4G PC Shadow of the Tomb Raider Co-op: Does It Have Multiplayer or Co-op?