Most games that have been out for ten or more years don’t receive updates or patches. Thief II: The Metal Age and System Shock 2 were released over ten years ago by Looking Glass Studios, and both titles have just recently had new patches made available.
Patches for both games were created by an anonymous programmer who has source codes for both titles. The patch for each title is made up of bug fixes, graphic updates, and gameplay improvements.
Resolution support, as well as texture quality, is now available for each release.
Both games are rather tough to find, especially for people who never have played either title. Amazon, Green Man Gaming, and GOG occasionally offer them, so digital copies would be the best bet for interested gamers. Hard copies of both games are both rare and expensive.
Thief II is a first-person stealth-based action game, while System Shock 2 is a first-person sci-fi action game with some RPG elements.
For gamers interested in the whereabouts of these patches, they can be found here.