Mystery of Time and Space is probably the grandfather of point and click games, which are the best kind of online games as far as I’m concerned. Basically, you are trying to escape from a room or building, and you have to click around and solve puzzles in order to do so. For example, you can click on rugs and things to find keys, which will allow you to open certain cupboards to find other items to help you get out. There’s a lot of logic involved, but it’s absurdly addicting. If you play this, be prepared to goodbye to that A on your Con West final. So worth it.