I know this game is intended to remain co-op only for the near future but I feel that darks souls multiplayer elements would be an interesting addition. There could be 2 main aspects:
- The ability to temporaraly summon the "spirit" of another exporer for assistance. the spirit could spawn in with randomised weapons based on the hosts security level and be unable to pick up any items.
- The ability to invade other players by inhabiting the body of a mimic. This could add a whole new level of difficulty to the game. Giving the invader a chance to hunt, and the invadee a chance to be trully hunted
(this pvp style gameplay could be emulated in co-op as well by allowing people to turn off their map markers)