The Syphon Filter series has received an age rating

Apparently, before updating Play Station Plus, Sony wanted to set age limits for some games. Age ratings for the Syphon Filter series, which is set to be released for Play Station 4 and Play Station 5, have been found on the South Korean commission's website. 

Syphon Filter was the best – I Can Taste the Mana

Days Gone Easter eggs suggest it's really a Syphon Filter sequel where Gabe and Lian failed to save the world

Find many great new & used options and get the best deals for Syphon Filter 2 (PS1) - Used at the best online prices at ! Free shipping for many

Syphon Filter 2 (PS1) - Used

Weekend Hot Topic, part 2: Your favourite underrated video game

Will We Ever See A New Syphon Filter Game? - Cultured Vultures

Got syphon filter a few days ago on for 5.70 I love this game : r/psx

Syphon Filter: Logan's Shadow - IGN

Will Sony Make A New Syphon Filter Game On PS5?

Syphon Filter: Logan's Shadow - IGN

PS Plus Premium game Syphon Filter 2 will have trophies

PLAY012 - SYPHON FILTER, walfroy