Accidentally revealed PlayStation 3 game Syphon Filter 4 aims "revolutionise" stealth by using a brand new fancy-pants engine developed by Sony London.
A proper unveiling will happen at E3, with a full release pencilled for Q4 2012.
Sony Europe told Eurogamer it refused to comment on "rumour and speculation".
Syphon Filter is a third-person action game in the ilk of Metal Gear Solid and Splinter Cell: you're a stealthy soldier who achieves the impossible. In Syphon Filter's case, you fill the boots of Gabe Logan.
Syphon Filter and Syphon Filter 3 (no SP2) are both available from the PlayStation Store (when that itself is once more available). Syphon Filter: Dark Mirror and Syphon Filter: Logan's Shadow are PSP games, and good ones at that.