Arknights: Endfield Sanctuary of Ink Pre-Download Guide

Arknights: Endfield Sanctuary of Ink Pre-Download Now Live

Pre-download for the Sanctuary of Ink version of Arknights: Endfield is now available on PC, mobile, and PlayStation 5. The update goes live after maintenance on 2026-10-15, and downloading early will let you jump in faster once servers are back up. For more Arknights: Endfield news and guides, visit our game hub.

This is a mandatory update. You will not be able to log in during maintenance, and you will need to re-download the game client afterward. The download sizes are substantial, so planning ahead is recommended.

At a Glance

• Pre-download available now for PC, Android, iOS, and PS5.
• Maintenance starts 2026-10-15 at 06:00 (UTC+8) for Asia server; 2026-10-14 at 17:00 (UTC-5) for Americas/Europe.
• Compensation: 900 Oroberyl for all players who created a character before the update.
• Storage required: PC 9GB, mobile 5GB, PS5 47GB (plus extra space for extraction).
• Mobile pre-download ends 2026-10-15 at 05:30 (UTC+8) — you cannot play during mobile pre-download.

Pre-Download Guide by Platform

PC

Open GRYPHLINK. A [Pre-Download] icon will appear to the left of the [Play] button. Click it to begin downloading. The pre-download size is approximately 9GB.

Mobile (Android and iOS)

Open the game. The [Pre-Download Resources] icon will appear on the login screen. Tap it to begin downloading. The pre-download size is approximately 5GB.

Note: Mobile pre-download is expected to end on 2026-10-15 at 05:30 (UTC+8). You will not be able to play the game during the mobile pre-download, so plan your time accordingly.

PlayStation 5

Go to the home screen, select [Arknights: Endfield], press the controller's [OPTIONS] button, and select [Check for Update] to begin downloading. The pre-download resources are approximately 47GB in size.

Maintenance Schedule

Maintenance times vary by server:

During maintenance, you cannot log in. Once it ends, you will need to update the game client.

How to Update After Maintenance

• PC: Close the game, restart GRYPHLINK, and click [Update].
• Android: Enter the game and follow the pop-up prompts.
• iOS: Go to the App Store and tap [Update].
• PlayStation 5: Go to the home screen, select [Arknights: Endfield], press [OPTIONS], select [Check for Update], and confirm.

If you completed or started the pre-download, the amount of data you need to download after maintenance will be reduced based on the resources already downloaded.

Storage Requirements

Ensure your device has enough free space before updating. The estimated storage space required is:

Extra storage used during extraction will be freed once the extraction is complete. For PC, installing the game on an SSD is recommended for better performance.

Compensation and Rewards

All players who created a character before the update will receive 900 Oroberyl as compensation. This will be sent via in-game mail after maintenance. The mail will expire during the next version update and maintenance, so claim it promptly.

For additional rewards, check out our Sanctuary of Ink Guide & Rewards article, which covers how to claim 1,000 Oroberyl, 10,000 T-Creds, and more from the New Version Guide page.

Pre-Patch To-Dos

Before maintenance begins, consider these tasks:

• Claim any expiring mail and rewards from the current version.
• Complete limited-time events that will end with the update.
• Use up stamina or other resources that may overflow during downtime.
• Start your pre-download to minimize post-maintenance wait times.

For a full breakdown of what's coming in Sanctuary of Ink, see our Sanctuary of Ink Update Details.

Day-1 Priorities

Once servers are up, here's what to check first:

• Claim compensation from in-game mail.
• Explore new content — the update adds two new Operators, Si and Argent Flow, plus the Contingency Contract: Indigo Experimental Operation mode and an inn management feature.
• Check the New Version Guide page for free rewards.
• Verify your settings and adjust as needed after the client update.

For more on the Steam launch and new Operators, read our Steam Launch & Sanctuary of Ink Update article.

Conclusion

The Sanctuary of Ink update is a major milestone for Arknights: Endfield, bringing new content, quality-of-life improvements, and a Steam launch. Pre-download now to save time, and mark your calendar for maintenance. Stay tuned to EarlyGG for continued coverage.