There's An Apparent Metal Gear Solid Reference In Ghost Recon Wildlands' New Splinter Cell Mission
https://www.gamespot.com/articles/theres-an-apparent-metal-gear-solid-reference-in-g/1100-6458170/
Ghost Recon Wildlands' new Special Operations I update is themed around Splinter Cell, effectively throwing a bone to fans of a series that hasn't been heard from since 2013. But it also seems to feature a brief reference to Metal Gear Solid.