I adore the campaign, but I almost exclusively play the Survivor mode maps now for the most part. They're perfect cause they are so varied and beautiful, but most importantly, they're condensed bite sized parts of the game. Easy plug and play. Everything from 5 minutes to half an hour. You can play and get a complete experience. That's why I always believe games need those shorter condensed modes. They need it. Too bad Aliens Dark Descent doesn't have game modes.
I hope Alien Isolation 2 still has the Survivor modes.