Armored Core 2

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Acquire Ranked AC Emblems After defeating an AC in the Arena, when the ''WIN'' message is displayed, press Select and Start simultaneously to add the emblem into the pre-made list.
Allow Overloaded AC After completing the game, load your cleared game data to be able to use your ACs with more than the allowed weight.
Infinite Energy While the game is unpaused, hit L2, R2, R3 all at the same time. If you did it right then a system error will come up saying Limiter Release. After a while though, that will switch to OB down and you cannot use any energy.
Pilot Enhancements When playing through the missions, if you fail a mission, you are still charged for the wear and tear on your AC. If, after losing several missions, you drop far into the negative money range, your pilot will be forcibly ''upgraded''.
For each upgrade, you'll need to drop below -50,000 credits. Once this happens, the game will be restarted with your new powers (i.e. clean slate, 5000 Cr), although you'll keep any parts you had from your previous game.
1st Time Enhancement: Radar You will be personally equipped with a 260-click range radar, which also has a missile display on it.
2nd Time Enhancement: Laser Blade Wave After a laser blade attack, press the X button to follow it up with a wave attack.
3rd Time Enhancement: Heat Reduction Your AC's heat taken from attacks will be reduced by half.
4th Time Enhancement: Fire Back Unit Weapons while Standing/Moving You can fire all back unit weapons from a standing or flying position.
5th Time Enhancement: Half Energy Use Your booster and energy-based weapons will use half as much energy as before.
8th Time Enhancement: Double Cooling Power Your cooling rate will be doubled.
Steal Emblems If you see an emblem in the arena that you want to use, select the appropriate AC and press Triangle to display the spec screen. Then, press Start + Select. If you entered the code correctly, you will hear a sound. Select ''Edit Emblem'' to view it.