Armored Core VI: The Boss Rush Hiding in a Mech Game

Ten years is a long time to leave a series in a cupboard. Armored Core: Verdict Day came out in 2013, and then FromSoftware went and became the most influential studio in action games on somebody else’s dime, and the mechs sat in the dark while everyone learned to say “Souls-like” with a straight face. Armored Core VI: Fires of Rubicon arrived on 25 August this year, published by Bandai Namco, directed by Masaru Yamamura — lead game designer on Sekiro — after Hidetaka Miyazaki started it and handed it over.

Read that credit list again, because it’s the review. This is a mech game directed by the man who designed Sekiro, and it plays exactly like you’d fear and hope.

The stagger bar is a posture bar

Every enemy in AC6 has an ACS gauge — Attitude Control System — that fills as you land impact damage. Fill it and the target staggers: it stops, it can’t act, and every hit you land while it’s down does bonus damage under the Direct Hit system. Your own ACS works the same way, so a boss can do it to you.

That is Sekiro’s posture bar with a coat of engine grease on it. Same shape, same argument: health is the score, and the real fight is over a second meter that measures whether you’re being allowed to act. Both games invert the natural instinct — chip away safely, retreat, repeat — because retreating lets the gauge drain. Pressure is the mechanic. Patience is the trap.

The difference is what you press. Sekiro gave you one sword and asked for timing. AC6 gives you four weapon hardpoints — a gun in each hand, a launcher on each shoulder — and asks for a build that can fill an ACS bar faster than it empties. Impact and damage are separate stats on separate weapons. The pulse gun that shreds shields is bad against armour. The bazooka that staggers in two hits reloads slowly enough to lose you the window it just opened. So the assembly screen stops being a fashion choice and becomes the answer sheet for the fight you’re about to lose.

I want to be exact about why this feels good, because “customisation” is a lazy description of it. The assembly screen constrains you three ways at once: total weight against your legs’ load, energy draw against your generator’s output, and the boosters that turn all of it into movement. Change the arms and your legs are overloaded. Fix the legs and the generator won’t feed the shoulders. Every build is a small optimisation problem with a personality on the other side of it, and the game grades your answer in about ninety seconds of live fire.

Missions, not a world

AC6 is mission-based, and after Elden Ring that reads as a retreat. It isn’t. Mission structure is what makes the assembly screen mean anything: you get a briefing, you get a rough idea of what’s in there, and then you build for it. An open world would dissolve that instantly, because a build for everything is a build for nothing. The garage needs a door with a known thing behind it.

This is the Sekiro lesson applied at a different scale. That game’s tightest design decision was refusing to let you respec your way around a wall, so the wall had to be climbed. AC6 lets you respec completely and for free between attempts — parts cost money, and the game refunds parts at full price, so experimentation is genuinely free — and then puts a wall in front of you anyway. The wall is the same. The tool for getting past it is a spreadsheet instead of a reflex, at first.

Chapter one’s is called Balteus, and it has already become the internet’s argument. It’s a hovering flying fortress with a shield, a missile barrage that fills the sky, and a second phase that sets the arena on fire. It arrives roughly three hours in and it stops a very large number of players dead, in the exact way the Genichiro fight did and the Asylum Demon didn’t. FromSoftware have used this shape for fifteen years: an early fight whose job is to teach, by refusing to let a bad answer through, long before the hardest fights arrive. Balteus’s lesson is that your loadout is a hypothesis, and that the pulse weapons the game gave you an hour ago are not decoration. People who bounce off it are usually people still trying to win with the starting build, which is the point — the game is telling you to go back to the garage and it is telling you loudly.

Where it fights itself

Two seams, and neither is fatal.

The first is that the boss rush eats the missions. When the duels are this good, the connective tissue — clear this outpost, escort this thing, hold this line — reads as a corridor between the good parts. The level design is smart and mostly brief, and it is still hard to care about a supply depot when there’s a duel waiting.

The second is the repair kit economy. You carry a fixed number of repair kits into a mission; that’s your entire healing budget, and it doesn’t refill at checkpoints in the way you’ll want it to. The intention is attrition. The effect, in practice, is that a mission you’re limping through is usually better abandoned early and started again clean, which is the design quietly paying you to give up. It’s a small thing. It sits in your teeth.

Then there’s the structure. AC6 wants three passes: NG+ and NG++ unlock new missions, new fights and different endings, and the story is genuinely unrecoverable from a single run. I take a forty-hour ask seriously as a thing demanded of a reader’s life, and I’ll defend this one — the repeats are short, the new content is real, and the mission list you’re re-running takes twenty minutes a sitting. But the game should say so on the tin, and it doesn’t.

The ancestors

The obvious one is Armored Core itself, 1997, on the PlayStation. I came to that one the way most Europeans did — through a magazine that couldn’t decide whether it was a sim or an action game — and it was genuinely both, in the sense that it was mostly a menu. You spent an hour in the garage, ninety seconds in the field, and the ninety seconds told you your hour was wrong. AC6 preserves that ratio with the lag taken out.

The deeper ancestor is the mech sim: MechWarrior 2 in 1995, the heat management and the loadout tonnage and the sense of driving a building. AC6 keeps the tonnage and deletes the weight of the walk. Its mechs move like a fighting-game character with a jetpack, which is precisely the fusion — sim maths, arcade hands.

And the Sekiro debt, again, which I’ve written about at length: this is FromSoftware’s second game about a meter that isn’t health, and they’re now unambiguously better at that than they are at hit points.

The verdict

Fires of Rubicon is FromSoftware admitting what they’ve actually been good at since 2019: the duel. It has dressed the duel in a garage, and the garage is a brilliant piece of design, because it converts “get better at this fight” into “understand this fight well enough to describe it in parts”. The mission wrapper is the weakest layer. The bosses are among the best they’ve made, which given the company is a serious sentence.

If you bounced off Elden Ring because the open world diluted the fights, this is the concentrate. If you loved the open world FromSoftware earned, this will feel small until Balteus, and then it won’t. It’s on PC, PlayStation and Xbox; the PC version is where the assembly screen is comfortable, and the assembly screen is where you’ll live.

Go back to the garage. That’s the game.

Spoilers below

The three endings are the argument the missions can’t make. Fires of Raven, Liberator of Rubicon and — behind two full playthroughs — Alea Iacta Est all turn on what you do about Coral and about Ayre, and the structure means you can’t be told what the choice costs until you’ve already made it once. That’s an old-fashioned use of NG+, and it works, because 621 is a merc who doesn’t get context until someone pays for it. The player and the character learn the world in the same order.

The Sea Spider is the fight that reveals the real design. It has no gimmick weakness and no phase you can skip. It is a pure demand that you understand the ACS system, played at a tempo where the stagger window is worth roughly one good decision. Beating it means you have finally stopped thinking of your build as a preference.

And Walter’s arc is the closest FromSoftware have come to writing a boss who is sad rather than mysterious. The final chapter’s willingness to make a man’s principles into a health bar is unsubtle and it lands, mostly because the game has spent a whole campaign teaching you that everyone on Rubicon is renting their convictions from somebody with money.