In the morning in the desert of New Mexico, USA. As you're the visitor who walked inside the Black Mesa Research Facility when the scientists looks at you and they greets you with happy expression while waving their hands. After a while when you've suddenly meet four member of the Black Mesa Science Team included Dr. Walter, Dr. Slick, Dr. Einstein and Dr. Luther. Four scientists slighty looks at you with a curious expressions, what would you do? Talk to them or ignore them and keep taking a tour around the facility?