If you can get a hold of MGS3:Subsistence, it comes with a port of the first Metal Gear games for the MSX. MG1 is kinda've awkward and more intriguing in theory than execution but Metal Gear 2: Solid Snake is basically a 2d MGS1. A great plot, wonderful boss fights and puzzles that were ahead of it's time. It also has your battle with Grey Fox (he's a wuss by the way...) and a pretty damn hilarious battle with Big Boss.