A series of games from Konami spanning 4 games (Silent Scope 1-3 and Silent Scope EX), the first of which was released in 1999. The games' most prominent feature is the Sniper Rifle gun mounted to the cabinet rather than the typical pistol Light Gun that was used in games like Time Crisis or House of the Dead. The scope of the rifle contained an LCD screen to simulate the pinpoint precision of real scopes. Also known for being one of the few arcade gun games to actively encourage headshots: They are always an instant kill, even on bosses, and confer a hefty time bonus. Games like Time Crisis gave you the most points for headshots but the SS games actively pointed this out.The games were ported to the Sega Dreamcast, PlayStation 2, Xbox, and even the Game Boy Advance. The Xbox version was noted for its severely stripped-down rifle accessory.
These games include examples of:
Attack Its Weak Point (For human bosses, a headshot is an instant kill. For helicopters, shooting at its rotor will do the trick.)
The first actual boss in the third game has two. The first is obviously his head. The second is his beloved teddy bear. Hitting either will take him down in one shot.
Camp Gay: The Collector, The Prince of Rose and the Phantom.
Catch Phrase. In #3 if a criminal has a hostage and it's a One Bullet Left scenario your partner will comment "he's taken hostages, bring him down in one shot." Pull it off and she then comments "You're the greatest."
Cold Sniper (In fact, in the attract demo for EX, one of the requirements for the player character's position is to be "unemotional.")
Dual Boss: Tom & Jerry in the first, Sho & Kane in the second.
Heroic Mime: The player character in the first game and EX.
Improbable Aiming Skills: Some of the most ridiculous examples are displayed in boss fights, like sniping the driver of a semi-truck barreling towards you at full speed, or sniping the rotor of a hostile attack helicopter.
It's quite possible in certain missions to hit more than one enemy with a single bullet. Don't miss anyone and you'll get greater than 100% accuracy. "Ultimate Sniper" indeed.
Sniper Scope Sway: Since the arcade machine has an actual sniper rifle to hold, complete with a zoomed in screen to allow you to use the scope, any sway and bob to your view is the result of your actual movements. As a result the real world techniques of relaxing, holding your breath, and so on apply, but since the rifle is mounted and you're typically not aiming at targets that are too distant, you don't need to worry about it as much as real snipers.
Sniping the Cockpit: In one level you can take down a Harrier jet in one shot by scoring a headshot on either pilot - in another car chase level you can render everyone in a car ineffective by shooting the driver. This includes the boss, who attacks by trying to run you down with a hijacked semi.
Stealth-Based Mission: Every level to a degree; being caught (often from dillydallying for too long or missing a shot) doesn't end the game but will call the attention of additional Mooks. In one particular penultimate stage in EX, getting caught results in stage failure, booting you back to the stage select with a lot less health (or if you don't have enough, a continue screen).
Timed Mission: The entire damn game. Kills get you extra time. Headshots get you a lot of extra time.
True Final Boss: In Silent Scope 3, you face off against Robert, your commander, who's also the true terrorist leader, and can only be accessed by not continuing throughout the game.
When All You Have Is A Sniper Rifle: The player gets no other weapons than a sniper rifle and no backup, so it doesn't matter if it's a tank, a helicopter, a mook standing three inches away from you, or whatever else, you're sniping it to death.