Cyanide Studio's Styx: Shards of Darkness will support co-op multiplayer throughout its campaign, and since the stealth-focused RPG is only eleven days away from release, publisher Focus Home fired over a new "cooperative assassination" trailer that gives us a sampling of what we can expect when we dispatch enemies alongside a human-controller goblin ally. For a game like this, co-op definitely ratchets up the entertainment value for me: