What do you think of them?
The only one I've heard of, and played, is Silent Scope EX. That game is certainly fun in the beginning, where you're hidden and skillfully handing out headshots to each unknowing terrorist you see. However, it gets less fun later, when you're seen, and have to constantly shoot the targets right to avoid taking damage. Although headshotting a guy while he's flying in a helicopter is pretty cool...
But on later levels, the amount of action just gets annoying with the boss parts. There's one guy before the final boss that has this invisible machine that creeps up on you and blasts you, and you're supposed to blast the guy with your sniper rifle, at a cockpit about 3 feet wide, from 3 fet away. This sounds easy until you see the target is moving really fast and has fifty guns and drills in your face. Anf then there's the level where there's the guy with an artillery piece trying to blast you in a helicopter-Only in a video game, yes.
The later levels I most enjoyed were the ones where you sneak in through an ammo delivery and shoot everyone who comes into your sight. And they don't notice ou until you shoot, or until they look at you, obviously. tgives a bit of challenge by making you fail the mission if you're seen, so it's still possible to mess up where you couldn't on early levels.
The last mission brought back the "bring him down in one shot" boss that I so loved in the early levels. It was a flaming queer playing a piano, that would somehow launch a nuclear missle. His head was waving around like he was on acid or something, and he got a shot in the face, and he fell into a clif leading somewhere.
Games also love hiring psycho retards to detonate terrorist weapons.
I have nothing to say that is at all relevant.