Armored Core 2 is a Mecha video game in the Armored Core series, and a launch title for the PlayStation 2 in North America. Armored Core 2 represents the first major graphical overhaul for the series; while the three PlayStation-era games used the same engine with few changes between entries, Armored Core 2 featured a new engine built specifically for the PlayStation 2.

The player starts off with a basic armored core 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. From that point on the player is relayed missions by their Nerves Concord manager and completing these missions will advance the game's storyline. The Arena from Master of Arena makes a return, allowing players to compete in matches against other Ravens in order to earn more credits and new AC parts. Armored Core 2 was also the first game to introduce the Extension weapons, mounted to the AC's shoulder, and Inside parts, mounted in the core as bomb style weapons or decoys, as well as the addition of the Overboost Core, containing an auxiliary core booster which allows an Armored Core to move twice as fast as normal boosters would allow.

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