The King of Fighters XII

You must get this by playing as Terry without losing a round, clearing all 5 sets of 3 characters. Using him first you can keep a second controller on hand in case you are getting close to losing a round. If you interrupt after your life has been depleted, you will still null the achievement. It is also worth noting that you should change the difficulty to easy, and the time to 99 as time outs null the achievement.

Using the simple controls you can launch projectiles using Terry, however these aren't that strong. Using back and punch you can do a lunging special, which is good for closing gaps and then jumping away and repeating the process works on occasion. His backwards kick is also a good attack for closing the gap between yourself and the enemy. His ultra move which can be used when the bar at the bottom says max is used by doing down, forward + Punch. It is a blast of energy that shoots upwards so it will hit close enemies or those in the air, so use it with caution. Your best bet may be just to jump in with a heavy punch + Punch and mixing this with whatever supers you see fit. There's no real easy loop with Terry.

As with every character, keeping track of those you defeat during this arcade run that way you know which characters you still have to defeat from what remains of the roster for your King of Fighters achievement later on.

Acquired by beating Arcade mode with Terry Bogard without losing a round.

To be more specific, you must put Terry Bogard in your team and choose him to start 1st. Then you cannot lose a round at all or choose "retry" after you finish the stage. As long as you defeat all 15 opponents with Terry Bogard, you will unlock this achievement at the end of arcade mode.