Armored Core 2 for PlayStation 2

You are now known as a Raven to the Planet Mars and asked to take on special missions, each regarding one or more companies that have so much power they could squash you like a bug. Until you start to develop and hone your skills to such a perfection that every rival you ever had starts to get easier and easier. Finally, you become the master of the Arena, buy every part available in the extensive shop, and beat the game. Now things start to get better than ever.
This game is the most intense game I have ever bought as a simulation. It has become so important to me, I start to battle enemy AC's in my dreams. It was long awaited by me and my friends ever since the original release of Armored Core. It has become so much more developed, and more features have been added to make the game that much more addicting. Such as the ability to over-boost, or to gain special enhancements, and even seeing relics from the old version come back to the new...(Moonlight, Kurasawa 2).
Other games I would recommend would be the original Armored Core, and if you like shooter games, Time Splitters.
this was probably the best investment I've ever made on a game.