The Island Guardians
Broodmother Lysrix
A giant spider that spawns Araneos and shoots toxic webs. The easiest of the Island bosses.
- 19x Megatherium (They receive a massive damage and defense buff when killing the minion insects)
- 1x Yutyrannus (For courage roar buff)
- Clever, Hunter, Massive
Megapithecus
A massive gorilla that throws devastating boulders. The arena has a deadly instant-kill pit that your dinos can fall into if you aren't careful.
- 19x Rexes (High health and melee)
- 1x Yutyrannus
- Brute, Devourer, Pack
The Dragon
The hardest guardian. Breathes fire that deals percentage-based damage (20% of max HP), melting high-HP rexes in seconds.
- 19x Therizinosaurus (Herbivores take less fire damage. Feed them Sweet Vegetable Cakes to heal mid-fight.)
- 1x Yutyrannus
- Cunning, Immune, Skylord, Strong
The Tek Cave & The Overseer
To ascend, you must place the heads of the three Guardians into the Volcano terminal. The Tek Cave is a gauntlet filled with max-level Gigas, Purlovias, and instant-death lava. Bring a massive army to clear the path, multiple sets of Tek Armor, and glide your way to the final boss.
Expansion Bosses
The Manticore (Scorched Earth)
The ultimate predator of the desert. It flies constantly and shoots torpor-inducing spikes. If your dinos fall asleep, they will be massacred by Deathworms.
- 15x Wyverns (Lightning or Poison)
- 4x Rexes (to deal with Golems on the ground)
- 1x Yutyrannus
- Crag, Destroyer, Gatekeeper
Sir Rockwell (Aberration)
A massive mutant requiring a unique strategy. You must destroy his tentacles to make his heart vulnerable, all while dodging plasma orbs and Reaper Kings.
- High-damage Pump-Action Shotguns (for the tentacles)
- 1x Rock Drake (per player) to navigate quickly
- Megalosaurus (to distract Reapers on the ground)
- Depths, Shadows, Stalker
The Titans (Extinction)
Extinction features open-world bosses that can actually be tamed temporarily. You must defeat the Desert Titan, Forest Titan, and Ice Titan to summon the ultimate enemy: The King Titan.
- Instead of killing them, you can destroy the corruption nodes on their bodies using a Mek or Tek rifle. If successful, they stay tamed for about 1 day (ARK Official Community Wiki).
- On Alpha difficulty you need a Mega-Mek (combining 4 Meks), which removes the King Titan's roughly 90% damage reduction; Alpha can be done with the Mega-Mek alone, and the three tamed Titans are optional support (ARK Official Community Wiki).