To top it off, you have to fight a weakened version of Alatreon first in the Fatalis quest chain before fighting Fatalis proper. A literal trial by fire to determine the player's skill level. It even goes as far as forcing the player to fight the 1st phase solo. Nearly all of its attacks have a massive range and can kill you in one hit, it's extremely fast and aggressive, with soft DPS checks, and you have a 30-minute time limit. It puts previous boss fights like Alatreon, Extreme Behemoth, and even the Ancient Leshen to shame.
It is without a doubt the hardest boss fight in all of Monster Hunter: World. VPN Deals: Lifetime license for $16, monthly plans at $1 & more