The SWAT Officer is a playable character in Syphon Filter 2 and Syphon Filter 3's multiplayer mode. SWAT Officers also appear in Syphon Filter: The Omega Strain.
Syphon Filter 2
SWAT was called in to stop Gabe Logan from escaping New York; the former had been persuaded by the Agency that Logan was a terrorist. An unnamed female SWAT officer is trying to get to her partner that was shot. Unfortunately, there are Agency snipers in the building making this task impossible. Gabriel Logan shows up and offers assistance to help her reach her downed partner, which she accepts. Shortly, after that, she orders Gabe to freeze but Gabe ran off since there are agents in the building. Upon killing the agents and returning to where he left the SWAT officer he realises she is held at gunpoint by Lyle Stevens. He orders for Gabe to drop his weapon otherwise he will shoot the officer while the cop tells Gabe not to comply. Although Gabe obeys the antagonist, Stevens kills the cop anyway.
Syphon Filter: The Omega Strain
SWAT officers are seen arguing about the terrorists inside the Carthage Mall, in which snipers are detected. Though a cop attempts to pull his men out, his superior vetoes this and orders a team to enter despite the threat. Smoke grenades are used to prevent the terrorists from searching the area but it soon becomes clear they are using infrared sights that cut through the smokescreen.
The player later encounters wounded officers inside the mall, bleeding to death. Upon one's discretion they can rescue the cops or leave them to die. Players can find MDS A4 submachine guns on the offficers. A live cop can also be seen entering the mall and will be killed should players fail to lock the doors, or fail to stun the officer (if he entered).
Multiplayer
Syphon Filter 2
She is one of the characters you unlock upon getting the M-79 in the New York Sewers level. Just go all the way to the top of the stairs and kill the agents wielding M-79 grenade launchers. There will be a crate containing your personal M-79. Open it and you unlock her as a playable character.
Syphon Filter 3
She is one of the Syphon Filter 2 characters available from the start.