How do you 100% the original games?

[DANMATUS]

MGS4 is the easiest one since it actually has the trophies for it.

MGS4 is definitely not the easiest MGS game to 100%, I'd say it is comfortably the most difficult and time consuming in the series and perhaps out of most games you'll ever play lol. You have to complete 8 playthroughs minimum to do it and that's only if you're dedicating each playthrough to very specific aims which you'll have to stick with in a very guided manner, some of them will be extraordinarily long while others have to be really quick and are difficult (namely getting the Big Boss Emblem).

I ment it's easiest to 100% since it has trophies compared to the others, as in it has trophies you can follow and achieve compared to MGS1/MGS2/MGS3 where its community based. Not talking about game difficulty