I've really enjoyed playing Arkham Horror on here recently. There's another old game I have with similar qualities as that which I'd love to try to give a shot playing in this format together on here.
Betrayal at House on the Hill is another cooperative board game where you are stuck in a haunted house, working together to find a way out by exploring the game. There is a twist however, at some point during the game you unlock the haunt which reveals the real enemy of the game (Who happens to be one of your fellow players). At that point the game switches from a cooperative game to a cooperative vs player game.
If you're interested, let me know. Here's a link to Will Wheaton and friends playing this game on tabletop a few years back.