Armored Core 2 is a mecha video game in the Armored Core series. Sixty-seven years after the events of the first game, Earth's second largest corporation, Zio Matrix, acquires plans for a research project on Mars, dating back before the Great Destruction. Using
these plans, Zio sends a research team to Mars to begin the Terraforming Project which causes the Martian surface and atmosphere to approximate that of Earth. Other corporations quickly learn of the project and quickly follow Zio, bringing with them the competitive environment that existed on Earth.
Similar to the first game, the player starts off with a basic AC and is expected to complete a trial mission which consists of destroying several MTs. Completing the mission will register the player's character with Nerves Concord, a "mediation" firm much like the Raven's Nest of the PlayStation era games. From that point on the player is relayed missions by their Nerves Concord manager and completing these missions will advance the game's storyline.
CHEATS
Temporary invincibility
Press L2 + R2 + R3. A "Limiter Released" system error message will appear, and you will have unlimited energy during this time. After approximately one minute, the "OB Down" system error will appear. It will last as long as the previous error, but you will not have any energy. After "OB Down" is completed, your AC will recharge and return to normal. Make sure you finish off your enemy before you become vulnerable.
Plus cheats
Intentionally lose the first mission after the Raven test, then die with -50,000 credits or less to activate the "Plus" cheats. The game will restart from the first level with all items gained in the previous game. Your pilot name will vanish from the "Pilot name" slot. The more times this is done, the more cheats you will unlock. Some examples are better radar (grid system that detects incoming missiles), fire projectiles from laser swords (press Circle, then quickly press X), cooling twice as fast, being able to fire rear weapons while in motion, and double available energy.
UNLOCKABLES
Overweight cores
Successfully complete the game in mission mode and allow the credits to complete to be able to have cores that are overweight.
Unlimited energy, weight, and arm weight
Successfully complete the game and allow the credits to complete. You will now be able to play with unlimited energy, weight, and arm weight.
Control replay view
Go to the Arena and fight anybody. If you win, there will be an instant replay. Press Circle during the replay and the view will change to what your opponent is seeing. Press Circle again, and the view will change into an overhead view of the battle.