What I like with the 2 OG's is they are very different from each other, I'm tempted to try these colorized versions
The first one is very challenging and you can play it several times, they add ennemies when you finish it, but you can't save, so it could be frustrating if you have not enough battery.
As a kid I prefer the second one because you can save, you have a non linear game with the map and better graphics, or at least more detailed.
But few years back I retried the two ones and the first one was more enjoyable...
EDIT : here a look at the beginning of Metal Gear Acid ² on PSP, but in french, tuto and cutscenes skipped
that's my third time on this save, I used to play it a lot before, but I'm not the kind to do it with a lot of finesse, I'm just playing and playing in order to have more cards even if I don't use them all ^^ this video from my YouTube channel, which is full of videos of playing, no commentary, never, and not necessary interesting or not, it quite depends, so if you want to look at it
( I do have the PSP but for recording as for playing and saves I prefer to go EMU )
Counter Strike Source 4 frags in 13 seconds, I was lucky ^^