Armstrong, phase one | Bosses MGR: Revengeance Guide
Last update: 11 May 2016
The first stage of the fight with the final boss. The battle is short, because the boss's health must drop to 90%, after which a cutscene will start. After that, you need to bring the boss's health down to 90% again, to make it to phase 2.
Remember to parry Armstrong's "regular" attacks (when he glows red) and escape when he uses the unblockable ones (he glows in gold) - instead of escaping, you can dodge, but your timing must be right. Once Armstrong's health drops down to 90%, a long cutscene will start, after which the final showdown will start.