Syphon Filter is rather famous for its witty and remarkable quotes within its fandom.
- Gabriel Logan and Lian Xing, after failing their missions
- "Look around, Logan! This hall contains a mosaic depicting the entire history of your country's wars and aggression. We are about to make an addition to it."
- Anton Girdeaux taunting Gabriel Logan before their showdown
- "I'll pay you!"
- Jonathan Phagan thinking money can solve everything
- "You know, it's not too late, Logan. The Agency can still use you and don't forget: we're Lian's only hope for a cure! Do you have any idea what Syphon Filter is going to do to her, Logan? I've seen what it does to people. Soon she'll look like a walking corpse! Trust me. It's going to be a slow, painful death. Throw down your weapons, Logan. I think you'll find that we can work this out to everyone's benefit."
- Dillon Morgan trying to coerce Logan back to The Agency
- "I think you overestimate Mr. Logan's abilities."
- Man In Shadow a.k.a. Vincent Hadden undermining Gabriel Logan's skills and experiences, one of his biggest mistakes
- "If you're gonna be in a firefight, there's no one better than Gabe Logan."
- Lian Xing trusting Logan's abilities
- "Lian could always take care of herself."
- Gabriel Logan trusting Lian's abilities