Endgame Battle: Assaulting the Zenith Base | Horizon Forbidden West

Quest Description: The time has come to assault the Zenith base, free Beta and GAIA, and save life on Earth. Against all odds, Aloy and her allies must prevail.
After defeating Regalla’s Rebels, Aloy returns to The Base and confronts Sylens about his betrayal. With Tilda joining them, tensions rise, but Aloy orders them to stand down. Tilda reveals a plan to infiltrate the Zenith base, providing coordinates for a rendezvous point.
Aloy assigns Alva and Kotallo to disable the Zenith base’s regulator and hack their network. At the rendezvous point, Tilda guides them through a hidden tunnel into the Zenith base. Alva and Kotallo split off for their mission, while Aloy positions Zo and, if spared, Regalla for cover. Tilda and Sylens hack a node to protect the team from detection, and Beta communicates with Aloy.
As they near the Zenith launch tower, a swarm of Specters attacks. HEPHAESTUS, injected by Beta, creates Thunderjaws and Slaughterspines to battle the Specters, allowing Aloy and her team to advance. Regalla, if spared, buys time for the team but dies in the ensuing battle.
At the base of the launch tower, Zeniths demand Tilda’s surrender or face death. Sylens’ weapon disables their shields, and HEPHAESTUS’ machines take over. Aloy fights Erik and is assisted by Zo, who avenges Varl. Aloy climbs the tower, restricted by Gerard, and learns from Alva that the Zeniths plan to leave Earth due to a rogue AI, Nemesis, approaching from deep space.
On top, Aloy frees Beta, who reveals Nemesis is an entity that destroyed the Zeniths' previous colony and is headed for Earth. Tilda offers Aloy a spot on the Odyssey to escape, but Aloy refuses and defeats Tilda in battle.
Sylens, knowing about Nemesis from HADES, invites Aloy to join him on the Odyssey but she declines. He decides to stay on Earth and help prepare for the fight. Aloy’s squad celebrates their victory, and in the epilogue, Aloy sends her allies to spread the word about Nemesis while Beta reinstalls GAIA at The Base.
Objectives
Return to the Base
Assemble Your Companions
Talk to Your Companions (optional)
Go to the Rendezvous Point
Call Your Companions at the Campfire
Go to the Launch Tower
Go to the Top of the Tower
Kill Erik
Go to the Top of the Tower
Defeat Tilda
Return to the Control Center