Timeline III: The Heart of Darkness

parallel universe, Barney and the Man in Blue have picked you up in Black Mesa\'s new time machine, and you\'re returning to Black Mesa for some overdue R&R. But your journey is about to be interrupted... (Note: The pack includes a new hazard course. Playing it before the main mission isn\'t absolutely necessary but may give you some useful hints.) [/quote]
[quote] BACKGROUND Timeline III follows directly from the end of Timeline II (but it\'s not necessary to have played that first). After your successful mission in the Ice Age