The album version of the Alleikhreos Boss Theme in Arknights: Endfield (released with the Version 1.4 OST) is divided into three distinct musical movements. You can track the progression of the composition using the official timestamps below.
Track Breakdown and Timestamps
| Movement Name | Start Timestamp | Description |
|---|---|---|
| Adelphoclast | 00:00 | Opening movement establishing the theme's baseline rhythm. |
| Acheron | 02:37 | Mid-track shift marked by elevated tempo and heavy percussion. |
| Abyssus, Abyssum | 04:24 | Final movement building to the track's musical climax. |
How to Use Audio Cues in Boss Battles
While the album version follows a fixed timestamp order, in-game audio transitions correspond to boss phase shifts rather than strict clock times.
- Opening Movement (Adelphoclast): Plays during the initial stage of the encounter. Focus on learning standard boss move patterns and conserving defensive cooldowns while the music maintains a steady pace.
- Mid-Fight Transition (Acheron): Occurs at 02:37 in the standalone track. In battle, a tempo increase signals heightened boss aggression and potential area-of-effect abilities, marking an ideal time to prepare interrupts or shields.
- Climax Movement (Abyssus, Abyssum): Begins at 04:24. The dense auditory layer accompanies high-intensity boss mechanics. Maintain health management and defensive buff uptime until the encounter concludes.
Listening for these musical shifts allows you to anticipate phase escalations when visual cues become crowded by skill animations and particle effects.
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Emily Johnson
Emily writes practical mobile strategy guides with a focus on resource planning, base progression, and the early decisions that shape a long-term account.
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27 players commented on this guide.
Can you add more details about strategy in a future update?
This guide answered the exact question I had.
The tips are practical and easy to follow.
Good guide for Arknights: Endfield players. The strategy part was useful.