They don't make games like the old point and click Sierra adventure games of the early 1990s very often -- at least not commercially. However, the freeware Adventure Game Studio allows talented fans to design their own freeware pont and click adventure games.Several hundred (of varying quality, of course) are available.
If you want to design games, the design studio isteslf is a very nice envirnoment to work in. Here's what the web site says about it:
Adventure Game Studio (AGS for short) allows you to create your own point-and-click adventure games, similar to the early 90's Sierra and Lucasarts adventures. It consists of an easy-to-use development environment, and run-time engine.
The game interface is fully customizable, although the classic Sierra interface is supported by default. You need no programming experience to make a game using AGS - setting most game options is just a matter of point-and-click (though scripting is of course available if you prefer). AGS manages most of the game so that you don't have to - it provides load/save game functions, inventory management, and more.
Add in some interactions (ie. what happens when the player clicks on various things) and you're done. You can even create a standalone EXE file containing your entire game, which you can then distribute.
Of course, chances are good you are more interested in playing adventure games than in designing them. In that case, I suggest you start with some of the "award winners" listed here.
Operating System: Windows 98+, Linux (play games only)
Web Site: http://www.adventuregamestudio.co.uk/