Summary of "Arknights Endfield - Main Story Quest - Chapter 1 (Part 3) Full Playthrough"

Storyline (what happens)

Endman (the Administrator) and the Endfield team arrive at the UWST Originium power plant in Valley 4 to stop a growing Ether Rift at the ether test site.
The plant has been overrun by Bone Crushers / Landreakers and heavily damaged; survivors are scarce and communications are cut.
The team meets Professor Crow and Supervisor Pearlla (Perilica/Perlica), who reveal an emergency UWST protocol (Utuk / U-order) that requires two authorization key cards and a signal emitter to call major reinforcements.
Crow’s group has an authorization key card but the signal emitter is locked in a lab. The team rescues site staff, retrieves the emitter, and activates a beacon to call UWST retaliation strikes.
A prototype called Tata (built by Crow, Ivonne, and Andre) is intended to seal the rift; Tata ultimately sacrifices itself to close the ether rift, saving Valley 4.
After the battle the team secures the power plateau, receives UWST support, and begins repair and rebuilding efforts.
New wider threats are revealed (another large rift in Wuing/Wooling City and signs of a larger returning enemy). Higher authorities convene and Enfield’s authority is temporarily expanded to handle crisis response.
The chapter ends with preparations to investigate other rifts and the implication that Endman must recover memories and execute the Zeroth Directive.

Gameplay highlights / mission objectives

Clear waves of Bone Crushers (regular enemies) to advance through the power plant and reach the ether test site.
Use switches and transport belts to bypass steam leaks and blocked paths.
Locate and free trapped UWST crew and unlock the lab to retrieve the signal emitter.
Recover authorization key card(s) and the signal emitter to enable the Utuk/U-order support.
Place a beacon / tag coordinates to call UWST bombardment / artillery support (a scripted, mission-critical mechanic).
Engage and defeat a large boss (Angalos / ether-entity) guarding the rift — destroy appendages/segments first, then hit the main body/back for higher damage.
Protect Tata and move it toward the rift epicenter; Tata seals the rift but is lost.
After sealing the rift, regroup, tend to survivors, and prepare for follow-up missions.

Practical strategies / key tips (from the playthrough)

Rescue and secure UWST personnel early — they provide intel, items, and access (for example, key cards and emitter coordinates).
Search for switches and interactable environment elements to operate transport belts and avoid steam/area hazards.
Boss fights (large rift guardian):
- Focus fire on protective appendages first — they block attacks and can spawn shock waves.
- Avoid shock waves and large telegraphed attacks — jump or take cover when warned.
- Target weak points (back or exposed main body) after the appendages are down.
Use the beacon/tagging mechanic to call UWST artillery — it delivers heavy area damage and is critical during tougher waves.
Coordinate team roles:
- Ranged/casters: area control.
- Melee: tank and hold choke points.
- Quick units: interact with devices and open doors.
Prioritize map objectives and key items (authorization K-card, signal emitter, site director/lab) — these drive mission progress.
After battle, gather recorded data (Tata/protosync logs) for future intel and tech upgrades.

Notable gameplay / puzzle elements

Environmental puzzles: moving transport belts, activating switches, and dealing with steam leaks.
Tactical beacon / coordinate system to call in UWST fire support (mark target locations).
Data/signal-tracing sequences with Ivonne / protosync for filtering ether signals — narrative tied to unlocking next objectives.
Simulation/test room for blight scanning component — a mini-test used to validate protosync enhancements.

Key plot characters & organizations (featured in this segment)

Endman (the Administrator) — player character
Endfielders (team)
Professor Crow (Matt Crow) — scientist / ally
Supervisor Pearlla / Perilica / Perlica — Enfield supervisor
Chen — security / field support
Fiona — voice / fingerprint analyst
Ivonne — scientist, protosync developer
Andre — engineer (AIC / rebuilding manager)
Dean / Clevel, Site Director Daniels — UWST staff (lab/site)
Lysia — ex-Endfielder, lone hunter (brief appearance)
M3 — elite operator, Zeroth Directive executor
Tata — prototype machine (algorithmic model / sacrificial rift-sealer)
Neferith / Nefrith — antagonist associated with the ether rift
Bone Crushers / Landreakers — common enemy faction

Organizations and factions:

UWST (United Workers Syndicate of Talos 2) — major organization providing the Utuk / U-order
Endfield Industries
TGCC
HAS (Hongan Academy of Sciences)
Order of Steel Oak

Locations and tech:

Valley 4, Originium power plant / ether test site, origin load spring, origin/Science Park, Hub base, Wuing/Wooling City
Protocol Automation Core (PAC), AIC factory, Utuk / U-order emergency protocol

Sources / featured names (as they appear in subtitles)

Characters: Endman (Administrator), Professor Crow (Matt Crow), Supervisor Pearlla/Perilica/Perlica, Chen, Fiona, Ivonne, Andre, Dean/Clevel, Site Director Daniels, Lysia, Dolly/Sally (combat lines), M3, Tata, Neferith/Nefrith
Factions / Organizations: Endfield Industries, UWST (United Workers Syndicate / UW WST), TGCC, HAS (Hongan Academy of Sciences), Order of Steel Oak
Locations & tech: Valley 4, Originium power plant / ether test site, origin load spring, Hub base, Wuing/Wooling City, Protocol Automation Core (PAC), AIC factory, Utuk / U-order emergency protocol

No external gamers or streamers are named in the provided subtitles; the text covers in-game characters, factions, and narrative/mission dialogue only.