Stealth action title Metal Gear Solid 4: Guns of the Patriots went on sale last June. A month later PlayStation Trophy achievements were introduced.
Game company Konami still hasn't added Trophy support in a retro-active update. However, that doesn't mean Konami has forgotten about MGS4 trophies.
Recently Konami's Brandon Laurino posted in the comments on PlayStation.Blog:
On the subject of MGS4/MGO trophies and Konami ID - we hear you. We have been circulating these issues internally, and we will report back as soon as we are able.
If Konami added Trophy support to MGS4, we'd probably go back and play the game — save, for the lengthy and talky Mission Briefings. We wouldn't watch those again. No way.