Here's a Tex Murphy like game I just discovered you may have overlooked. It's made by the boys at Access has a cameo in Pandora, plays like Martian Memorandum, and has chapters similar to the days in Under A Killing Moon and you can download it for free.
When my brother bought his copy of Marian Memorandum 10 years ago two of the disks didn't work, so he wrote Access software and they sent him Amazon for free to make up for it. It's a pretty good game..never finished it. Should download it again...
Around the time of Martian Memorandum, Access came out with another title you may be interested in. I remember playing it when it was new. It is called Countdown. The interface is similar to Martian Memorandum. The game is a darker setting than MM though. Anyway, it isn't quite as good as MM but still a good game in its own right. You can find it here...
