A tactical shooter is a subgenre of shooter game that includes both first-person shooting and third-person shooting. These games simulate realistic combat, thus making tactics and caution more important than quick reflexes in other action games. Tactical shooters involving military combat are sometimes known as "soldier sims".
According to IGN, tactical shooters "are about caution, care, cooperation, coordination, planning, and pacing. In these games, making decisive pushes, quick moves for cover, strategic retreats, and last ditch grabs at the gold are not only important to success, but balanced in such a way that they become enjoyable activities in play." David Treharne of GameSpew identifies four criteria for what qualifies as a tactical shooter: “[M]ainly you’re looking for the use of: realistic constraints of player movement; realistically simulated ballistics and accuracy; squad based or multiple approach/style accessibility; and a low tolerance or low health realistic damage model. Basically, you usually move slower than most shooters, your accuracy is much lower and bullets drop over a distance, you usually have a squad to command, and all of you only being able to take two or three shots before dying.”
Tactical shooters are designed for realism. It is not unusual for players to be killed with a single bullet, and thus players must be more cautious than in other shooter games. The emphasis is on realistic modeling of weapons, and power-ups are often more limited than in other action games. This restrains the individual heroism seen in other shooter games, and thus tactics become more important.
Overall, the style of play is typically slower than other action games. Jumping techniques are sometimes de-emphasized in order to promote realism, with some games going so far as to omit a jump button. In contrast to games that emphasize running and shooting, tactical shooters require more caution and patience (making use of cover and avoiding being caught in the open), plus tactical shooters are usually designed so that shooting becomes inaccurate while running which increasing accuracy for crouching or prone stances. Players often have the choice of shooting from the hip ("hippie") which is less accurate but gives a wider view of the area, or using the scope/iron sights for better zoom-in accuracy but at the penalty of restricted view. Some tactical shooters such as the InfiltrationMod for Unreal Tournament (1999) even lack the crosshair seen in other first-person shooters, in order to achieve a high degree of realism.