The well-known Portal GOG.com has decided earlier to put fifteen titles of historical Neo Geo, with 50% discount on the base price (or 75% off in case it opts for a bundle). Just below you will find special offers available at this address.

METAL SLUG 2, METAL SLUG 3 Bundle: 1, and X Fighting Classics Bundle: FATAL FURY SPECIAL, SAMURAI SHODOWN 2, SAMURAI SHODOWN V, THE LAST BLADE, THE KING OF FIGHTERS 2000 and THE KING OF2002 CLASSIC FIGHTERS.

Arcade Games Bundle: BLAZING STAR, BASEBALL STARS 2, KING OF THE MONSTERS, SHOCK TROOPERS, and TWINKLE STAR SPRITES.

Source: Reddit