KeyForge is the card game where every deck in existence is different from every other one. It's usually competitive, but Fantasy Fight is asking, "Why can't we be friends?" and released some cooperative scenarios for the game.
From the website:
A preeminent Logos organization, the Society of Logic and Reason, has lost contact with one of its undersea observatories. In anticipation of trouble, they have hired a group of Archons to join the crew of their ship, the SLRS Vortexilon, and investigate. And it’s a good thing, too—the observatory has been destroyed by a beast from ancient mythology, and an Aquan cult is behind it!
Fantasy Flight Games is proud to announce that cooperative play is coming to KeyForge in two free-to-play adventures that expand upon the themes and mechanics found in Dark Tidings.
These two exciting adventures present players with a new challenge to overcome using the KeyForge decks in their collection. With each adventure playing in a unique way and featuring multiple difficulty levels, you must come up with entirely new strategies to win. Whether you are playing by yourself or with up to two friends, these adventures will take you to the depths of the Crucible’s oceans and face-to-face with epic monsters and cunning cultists.