I've recently gotten into AGS, also known as the Adventure Game Studio. http://www.adventuregamestudio.co.uk/
It's a very well done, and easy to use program (assuming you have basic programming skills) which allows you to make your own adventure games. You can make something really retro, like an old-school King's Quest game, or something really totally new. It's all a matter of how much time and effort you want to put into drawing all the characters, objects, backgrounds, animations etc. And then there's the programming, which can take forever if you don't know what you're doing.
I don't have too much time or effort to spare right now, so