Here is the full list of all 14 SNK 40th ANNIVERSARY COLLECTION achievements.
Finish the second level of Vanguard.
Beat the Arcade version of Ikari III.
Beat the Arcade version of Victory Road.
Beat TNK III.
Beat Iron Tank.
Beat Crystalis.
Beat the Arcade version of P.O.W.
Beat Street Smart.
Beat Psycho Soldier.
Beat Prehistoric Isle.
Beat the Arcade version of Ikari Warriors.
Beat the Arcade version of Guerrilla War.
Beat the Arcade version of Athena.
Beat the Arcade version of Alpha Mission.