I think one of the best things out there for trying out games is Visual Pinball.
Back when I was using it, it took just a bit of fiddling and reading to figure out how to make it work right, but as long as you're familiar with cut & pasting files in specific locations on Windows Explorer it's cake. Nowadays I would imagine that they've got an easy-to-install download that gets it all set up for you or is at least a bit more simpler, but really it wasn't that bad even a few years ago. I guess what I'm saying is that it wasn't just install the thing and it was ready to go. At any rate, there are installation instructions that are easy to follow on the site:
http://www.vpforums.org/You have to download individual games and on most of them there are multiple versions to choose from. Personally I enjoyed trying out the many versions.
Besides being fun to play on its own and being free as well, it's really a great way to play games and learn the rules, shots and general play of most any pinball in existence.
The physics and graphics are usually being improved over time and I'll bet it's even better than it was the last time I tried it.
I'd go there and give it a shot. You'll be able to play several different versions of Twilight Zone at your leisure, for free and from the comfort of your desk at home and see if you'll like the game. Then try a bunch of other games too and use it to help decide what you want in your collection.
For the record, I had a TZ in mu collection for a couple years. I think it was an excellent game and probably would still have it now if I didn't sell off my collection to pay bills a few years ago. It was a project so I got it for $1600 and probably had $2k into it by the time I had it working. Sold it off with a bunch of stuff I acquired to really spiff it up but never got around to it for basically what I had into it, not including labor, and it was around $2500 (USD). Deals can be found especially if you don't mind working on a project.