As Gabriel Logan, one of the government's top agents, you must neutralize the terrorists that threaten Washington D.C. and destroy a biological weapon that has been built to end the lives of millions of innocent people. The action unfolds over thirteen missions that are chock full of dangers, hazards and puzzles.
Syphon Filter is based around a covert operation sent in to disarm a lethal virus code of the same name. To successfully complete your mission, you must utilize each of your character's skills accordingly. Logan will have to kneel, crouch, walk, roll, climb, jump and run to meet his objectives. Each one serves a different purpose and it will be up to you whether you should try to jump a laser-alarm or crawl under it.
Fortunately for you, a wide variety of weaponry and special gadgets have been supplied. The weapons range from explosive grenades and tasers to silenced rifles and pistols. Like your character's maneuvers, each weapon should be used with precision and planning. For instance, a stealth mission would require the use of quiet weaponry -- a taser (electric shocker) or a silenced pistol would do the trick. For an all out war with an army of terrorists, you'd have to break out the heavy artillery including grenades and automatic firearms.
The game is played from a 3rd person perspective much like Tomb Raider. The various indoor and outdoor environments and character models have been rendered in 3D. Because the action gets pretty heated sometimes, the developers included a few different targeting modes to help out. There is the default mode, manual look/aim and target lock. When you're in a gun battle, you are given the option to lock on to your closest foe.
Each level starts of with a mission briefing carefully outlining what it is that needs to be done. These details can be accessed anytime throughout the game via a communication device. This device also handles the weapon systems and game options. Additionally, Syphon Filter supports the Dual Shock Analog Controller for precision aiming and vibration. ~ Joshua Romero, All Game Guide