ZOE2 was one of the first games I played on the PS2 and even now I still enjoy it! I was amazed at the game-play, graphics and re-playability of the game when I first started and even today still feel that this game could compete with the latest platforms! As far as action and fun goes this game is great! You are constantly fighting off hordes of enemies from the very small, like a pilotless fighter, to the massive, like a battleship! What's really great is that you have an astounding amount of different weapons and moves to try out that let's you customize your very own style of playing.
The game itself is actually fairly short. If set to an ‘easy’ difficulty level you can skip the cutscens and finish the game in about 3 hours or less, but it has plenty for you to do in terms of bonus stages where you can play time trials, boss battles, versus (2p or Con) just to name a few.
“If it's so great, why not a 5 stars?” The game and graphics are great! The plot and voice-acting, not so much. It's not what MGS2 was to some of us, but I just felt that the characters motivations, especially those of Nohmann, the main antagonist, just didn't make sense at all. Maybe I'm too used to classic super-villains like the Joker, but this guy just came across as nothing more than a power hungry froot-loop! :)
If you're an anime fan, or super-robot fan, then you are going to LOVE this game! Even if you are not, I strongly advise you to at least check it out! You won't be disappointed!