Eternal Chaos

Eternal Chaos is a big creature overhaul for ARK: Survival Ascended, available on all platforms. It adds more than 360 custom creatures spread across new tiers, each with special attacks, plus over 14 custom bosses with rising difficulty and loot tied to progression. It suits players who want a hard, high-power game. It is unrelated to the ASE mod Ark Eternal.

• Berserk mode lets a tamed creature hit back harder after taking heavy damage
• A hybrid system fuses two creatures into one that inherits traits of both
• Shoulder pets can be upgraded with combat or utility augments
• Creatures spawn based on each map's ecosystem, so it runs on official and modded maps
• Must be first in the load order; maps with few vanilla spawns, such as Aberration, are a poor fit

Full guide: Eternal Chaos Mod Guide