Why can't I play the game?? Show me the photos?? Thank you

[He Zong Lin]

Alas, I can’t play, the video. Can you show me the detailed steps of the photo operation?? Thank you

[barbudreadmon]

@he-zong-lin metal slug 6 isn't a neogeo game

[manryeclipsed]

neogeo bios missing

[OyyoDams]

Double post: https://forum.recalbox.com/topic/24460/recalbox-7-2-1-why-can-t-i-play-the-game