ACA NEOGEO REAL BOUT FATAL FURY SPECIAL

This must be done with a single credit in original mode. If you lose and have to restart with a new coin, your score carries on but the achievement will NOT count.
Select English Version ORIGINAL MODE from the title screen.
Press for the options menu to appear, go to game settings and set the difficulty to level 1.
Select Franco Bash (bottom 2nd from the left at the character selection screen) and Cheng (bottom right) as your opponent.
On the easy difficulty you should be able to Hold forward and press on each opponent until you get to 500k.
If you are still having trouble, hold back to block.