Access Software intended to continue the Tex Murphy series, but there was no time for a new story, so "Tex Murphy: Overseer" was conceived as an ambitious retelling of the first game, "Mean Streets", with state-of-the-art FMV videos and 3D environments. The timing was not right, though: adventure as a genre was dying, Access Software was sold to an uninterested Microsoft, and it was still too early for DVD tecnology, so the superior DVD version or the game was (and still is) unplayable on most computers.
If you have played the previous Tex Murphy FMV games, you know the drill: a sci-fi noir story performed by familiar TV actors in virtual backgrounds, with lots of puzzles and the best hint system ever. And like the previous games, "Overseer" is once more a great adventure game, still miles above other FMV titles.
You can play the CD version currently available here. Still, if you are new to the series it would be a good idea to start with "Under a Killing Moon" or the previous installment, "The Pandora Directive" (one of the finest adventures ever made), and continue here if you like what you see.