shin_jigen_game_neptune_vii -> choujigen_game_neptune
chou_megami_shinkou_noire_gekishin_black_heart -> choujigen_game_neptune
Reason: Both are part of the Hyperdimension Neptunia series.
Though on that matter, creating an umbrella tag for the series might be more appropiate than implicating everything to the first game.