I think all gamers love first person shooting games, although this genre comes in many different forms such as classic setting like Call of Duty World at War or Brothers in Arms. These games are set in a world war scenario. You will be able to use old rifles with knife at the end, grenades, and other classic firearms built in the past.
There are also games that are fictional like fighting with Aliens and different beings such as Turok, Titan Fall, Bioshock, Overwatch, Destiny and Borderlands. These games are more futuristic and you will be able to use more advanced weapons such as plasma canon, laser beam, and other awesome weapons that is not available in real life.
If you love zombies in movies, there are also specific category of first person shooting games such as Left 4 Dead, Dying Light, Resident Evil, Day Z, Call of Duty Zombies. These games are not for the faint-hearted as these are full of suspense, frightening scenes, not just shoot and kill action.
There are also realistic games like those types of survival and mission/quests where you need to survive by defeating a bunch of goons. Popular game titles for this category are the Far Cry game series, Ghost Recon, Call of Duty, and many more. Most game story line for this category is when you are trapped in a remote island and you need to do everything to survive, save your friends, craft your items, find your way out from different locations, and most important stay alive and don’t get yourself killed.
Last but not the least are the battle arena type of shooters such as Battle Field, Counter Strike, Call of Duty multiplayer where you need to get the high score before the time runs out. Basically you are divided in two teams fighting each other and the ones with the most number of kills is declared the winner in the end. These games are also comes with in-app purchase for character customisation and to unlock premium items, experience boost and many more.