TRISTEGO arrives at the Yuliang Spring Festival as a new Co-Op boss

A threat born of simulation leaps into real-world combat. Yuliang’s Spring Festival introduces TRISTEGO, a new Co-Op Drill boss that mergesthe defense of TRICERAwith the raw firepower of STEGO, pushing the event’s challenge to new heights within the Lunar Simulation Network

The encounter presents a 20-minute Co-Op Drill where squads must take down TRISTEGO before the clock runs out. Successfully completing the trial rewards players with 1,600 Spring Festival Tokens, making coordination, sustained DPS, and combat pacing the decisive factors for victory.

Before diving into the fray, players can utilize a new prep zone to optimize their gear through Weapon and Ammo Airdrops. Fine-tuning your loadout is essential to survive a boss designed to punish mistakes and put team synergy to the ultimate test.

With this update, Once Human bolsters its seasonal roadmap with high-impact cooperative challenges, where pre-raid planning and teamwork define the Spring Festival experience.