The Chzo Mythos games. Point and click adventure series made in AGS.
I first played 5 Days A Stranger when it was out, and it was my favourite adventure game.
Then 7 Days A Skeptic, which was basically more of the same and I thought it was very cool.
After that is Notes, which is a text parser instead of point and click. Still a lot of fun, but I always use the guide to help myself in parts.
Last one was 6 Days A Sacrifice, which I don’t remember very well, I haven’t played it as much as the other games.
Also the same guy made a game called 1213, which I loved. It played more like Flashback, cinematic platformer style.