Aquí te dejo los pasos para descargar KOF Mugen:
is a free 2D fighting game engine created by Elecbyte. It allows users to create their own "dream matches." KOF Mugen specifically refers to custom builds that replicate the gameplay, sprites, and HUD of SNK’s The King of Fighters (typically styles from ’97, ’98, 2002, or XIII). descargar+kof+mugen+para+pc+link
Ve a mugen.cfg y cambia GameSpeed = 60 . Reduce resolución a 640x480. Aquí te dejo los pasos para descargar KOF