On August 25th, King Of Fighters turns 20 and to celebrate, SNK Playmore has once dropped the prices of ALL of its iOS titles to 99¢ each.
That includes all games in the Metal Slug series, all of the The King of Fighters titles, and even the IAPs for THE KING OF FIGHTERS-i 2012 (‘NESTS-Style KYO’ and ‘IORI with the Power of Flames’) are also on sale for 99¢ each (50% off).
Note that App Store prices fluctuate frequently and there can be some propagation delay, so the prices above may not be correct. Always make sure that the price is correct before clicking 'BUY'.