The Machine Lifeforms are wilding the fuck out. Amassing in huge numbers and filled with (I assume) Adam’s rage, they quickly surround and overwhelm the Resistance camp. Fresh off their big guest appearance in episode 10’s omake, the redhead twins perform triage as Lily ponders her unit’s next move with the enemy growing and their ammo dwindling.
2B shows up to lend a much appreciated hand, and her Pod downloads a new, even bigger ML-killin’ sword. Commander White goes to the plate for her soldiers, but the Council of Humanity (who may well be neither a council or human), refuses her request for logistical aid, citing a greater purpose. Even so, 2B and the Resistance are still able to activate an EMP that disables the advancing ML armies.
Unfortunately, after it starts to rain, all of those neutralized ML husks combine to form a colossal Adam just as 9S returns in his mech. A resistance fighter fires a bazooka that topples Big Adam, but he simply transforms into a frankly silly looking giant monster, with the newly two-toned Adam lodged in its skull.
Rather than despair at the enemy’s evolution, Lily rallies her troops, and when they respond with unswerving loyalty, she looks the happiest and most excited she ever has. She believes they can defeat that big thing, and I believe her too.
2B engages the scary-fast, scary-vicious “elite” MLs, and while 9S’s first hacking attempt on the monster ends with the destruction of his mech, he is caught in midair by Pascal, who along with his village did not go berserk since they were cut off from the main network.
While he may technically be breaking a YoRHa regulation or two, 9S dons a heavy-duty hacking connector for his second attempt to shut the monster down. 2B is initially overmatched by her three elite hyper-berserk MLs, but manages to trick them with a hologram of herself and slashes them to smithereens with her big sword. It’s a magnificent spectacle.
Pascal carries 9S to the monster’s head so he can contact it directly with his gauntlet. Once he’s hacked in, 9S quickly realizes that Adam is pretty much going mad, which explains why the ML and the monster are totally out of control. But as usual, he’s able to buy just enough time exploring the various metaphorical constructs thrown his way and stab the cyber-Adam at his flaming table.
This causes the monster to start moving in the direction the Resistance troops want: right into the line of fire of a salvaged railroad cannon. When the monster is thrown back, an ICBM launches it into the atmosphere. While it initially survives and begins to plummet towards the earth, it appears to be finished off by a giant particle beam, I assume from an orbiting satellite weapon.
The battle against Adam and his berserk ML army escalated quickly, and appears to end just as quickly with a great victory for 2B, 9S, Lily, Jackass, and the androids. The omake is a brief one, with 2B and 9S petting their Pods as if they were pet puppies, and actually doesn’t result in a Game (or World) Over. With the Big Bad vanquished, I wonder what’s in store for the final episode, knowing a second cour has been confirmed.