FPS franchises compared to movies
Half Life = Alien
Half Life will forever be remembered in our hearts for revolutionizing multiplayer with Team Fortress and Counter-Strike. It did, however, manage to do one important thing that the Halos and Modern Warfares of today treat as an afterthought.
It offered an amazing single player experience with plenty of survival horror elements and those headcrabs that are every bit as creepy as the facehuggers and chestbursters, if not more so. Understandable, because single player was much more relevant during Half-Life’s time.