Fixing nearly everything that was broken in part one, MG2:SS is the definition of what a sequel should be.
Several years after the Outer Heaven incident, Solid Snake is again called upon. World renowned scientist Dr. Marv has engineered an organism that refines crude oil, however he has been kidnapped during a terrorist revolt in Zanzibar Land. Snake must infiltrate the enemy compound and rescue him, though many surprises are in store for the legendary soldier.
The difference between the two MSX metal gears is astonishing. Judged against this sequel, the first game feels primitive. The graphics are more colorful with more fluidity in the movements, the controls are more responsive, and the sound is vastly improved, particularly the music, which was almost teeth grinding in the first MG. Other improvements include additional gear, more weapons, a refined alert system, and the god-sent ability to duck and crawl.
The most notable improvement in the game is the story telling. In the first game the plot was ill-developed; aside from the one major late game twist. Also, characters were devoid of personality and lacked meaningful bearing on the narrative. Not so with this (and all subsequent) entry. Snake is given much more to do and say this time, as opposed to his grunt like behavior in part one. The side characters get a lot more to do as well, enough that when something bad happens to one of them you feel it.
The game holds up amazing well given it's age. The design and complexity of the game are such that they remain almost unchanged throughout the rest of the series. The next game in sequence, Metal Gear Solid (PS1), is as much a remake in mechanics as it is a sequel in story.
A few small annoyances keep the game from retro-perfection. Enemies will occasionally spot you as soon as you enter/exit a door way and there is nothing you can do about it. The guns you are (eventually) equipped with fire bullets so slow that baddies will often out run them off screen. Also, while the card swapping shenanigans of the first game have been noticeably reduced, it's still tedious to cycle through several cards just to see which (if any) will open a door. Lastly, the game has a habit of throwing a complication at the play without providing any readily apparent solution; either get a walk-through or be prepared for LOTS of aimless wandering.
Despite the few grievances levied against the game, it is still a fantastic experience that all Metal Gear fans should check out.
8/10
