Annihilate anything that moves by any means necessary and live to tell the tale. Don’t let the overwhelming rival force capture the location. Unlock new ones after every successful round. Kill them from a distance using an arsenal of available firearms.
Stand in the same spot and defend it from waves of incoming enemies. Start a Special Strike Operations game online to see a perfect example. Thankfully, fans of gritty and life-like settings don’t have to fear. Nowadays the developers often prefer fictional worlds with futuristic weapons. However, the initial preference for realistic tactical combat was short-lived.
Ever since the first installments, they have never gone out of style. Competitive first-person shooters have always been extremely popular.