Upon awakening, you'll be guided by a mysterious voice. Your first task is to locate a Little Sister to bond with. Head through the flooded corridors, picking up the Drill and Rivet Gun along the way. You'll encounter your first few Splicers; use your drill for close-quarters combat and the Rivet Gun for ranged attacks. Follow the objective marker to a large open area where you'll witness a Big Daddy with a Little Sister. Engage the Big Daddy, using environmental hazards like oil slicks and explosive barrels to your advantage. Once defeated, you'll have the choice to Rescue or Harvest the Little Sister. Rescuing is generally recommended for the long-term ADAM bonus.
