Armored Core, the Playstation 2 Mecha Game Series

I recently bought myself an old Playstation 2, and the game, Armored Core 2 - Another Age.
The game takes place in a post-apocalyptic world dominated by mega corporations. The player takes on the role of a Raven, a mercenary fighting for the highest bidder. Completing missions gains you money, which can be used to purchase upgrades for your AC (Armored Core, or mech). If you cause any collateral damage during the mission, you are expected to pay for that, as well as repairs for your AC, and any ammo used.
It should be noted that Armored Core 2 - Another Age is cannot be experienced to its full potential without save data from Armored Core 2. (I found this out only after buying the game, sadly, I do not own Armored Core 2.)
This said, Armored Core 2 - Another Age is still fun without the save data, just incomplete.
A word of caution about the controls- Armored Core, unfortunately, does not support full analog control, the R2 and L2 buttons are used to look up and down instead. This can get VERY annoying at times, but overall, Armored Core 2 - Another Age is a thoroughly fun, though hard, game.