Wow, 30 years, although I didn't get into it until the PS one. I have the NES one, but no its a messed up version that I myself never was good at. I actually got the MGS2-3-Peace Walker HD for Christmas. I saw it has the original msx metal gear/2, but now its hard to go back and play that. Would be nice for a remake, but now a days, it would probably be so short. Maybe they could mix the 2 into one longer game with 2 chapters.
Also looked closer at that papercraft file, and yeah, says Rex plus & classified mech for MGS3. Kinda weird they did that. Never have printed a papercraft model ever, but it looks somewhat low res.
I also have the Back to the Future 3 train in paper, but that looks VERY complex....kinda scared to try.