Half Life on Steam. Minimum 5. 00 mhz processor, 9. Windows XP, Mouse, Keyboard, Internet Connection. Recommended 8. 00 mhz processor, 1. Windows XP, Mouse, Keyboard, Internet Connection. Bentley Prerequisites on this page. Half Life Blue Shift Pc' title='Half Life Blue Shift Pc' />HalfLife Serie principale HalfLife Opposing Force Blue Shift Decay HalfLife 2 Episode One Episode Two Serie Portal Portal Portal 2. In Blue Shift erlebt man die Geschehnisse um den Forschungskomplex Black Mesa aus der Sicht des Wachmanns Barney Calhoun, dessen Ziel es ist, aus dem Komplex zu.