Mecha kino. This to Armored Core 3 is like what Master of Arena was to the original Armored Core. Such a good expansion with great missions and set pieces. Despite it being less missions compared to 3, it increases the amount of content and replayabilty with a huge amount of unlockable parts that require different playstyles. Having so much more weapons on the left arm makes customization all the more fun with new options like dual wielding with a machine gun and a sniper rifle. The big increase in difficulty is also comparable to the older games and while it may cause bigger frustrations, it is a rewarding challenge. The soundtrack is a banger too especially the main theme of Silent Line. Overall it checks all the boxes in improving Armored Core 3 in which was already a engaging, fun and challenging game.