The Meal Gear games, as with anything else worth playing on that platform, such as Akumajo Dracula, are MSX2 games. MSX2 systems can be had for next to nothing on Yahoo auctions, and there are many models to choose from. Your options narrow on the further revisions. Once you get into MSX2+ territory, and prices go up, and the Turbo R of which there are only two revisions, both from Panasonic, cost a fortune and are generally not worth the price increase over a 2+ for the budget minded shopper. Very few games support the Turbo R features anyway.
The Metal Gear games themselves are one of the more desired games on the platform so getting a physical copy will cost you a small fortune, and you won't be able to enjoy them unless you are fluent in Japanese. They are Kojima games after all. There are translation patches available but playing them would either require playing floppy disk images, plus a ram upgrade mod on your machine, or just a flash cart solution.
The flash cart solution is the more sensible way to go as then you can play all the games on the system upon paying a lump sum.
Since the MSX is a PC platform there are of course a couple of potential headaches, such as for an example the curious case of FM music expansions. Other than the built in PSG sound, the same mostly horrendous sound chip found in the Master System, some games support one of several FM expansion modules. The two most popular are MSX Audio, and MSX Music. Some machines come with one built in, but they are also available as expansion carts.
Some Konagi games actually come with their own music module built into the cart, so they will have great music capability no matter which machine you play them on. Overall I'd say the platform is worth investing in even though most games are very janky due to the limitations fo the platform there are nonetheless some gems here and there. They all cost a pretty penny to own an actual physical copy of tough.
But if you are just looking to play the original Metal Gear games I'd say getting a PS2 copy of Snake Eater and playing the translated emulations on there as a bonus is the easiest option.
Awesome. Thanks fort the info.
I think I'll stick with the snake eater version at this point. I have other fish to fry at the moment. But I'm jealous. It should be enjoyed on the original system I think.