Arknights Endfield Protocol Invitation Event Guide & Rewards

Arknight Endfield is rolling out a limited-time web event centered on player re-engagement. Protocol Invitation: The Return offers both active and returning players a chance to earn Oroberyl, the premium currency, by sharing invite codes and linking accounts. For those planning their resource budget or looking to bring friends back to Talos-II, this event provides a straightforward currency injection with no stamina cost.

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At a Glance

• Event Name: Protocol Invitation: The Return
• Duration: Throughout the Homecoming version (specific end date not provided)
• Requirements: Event Center unlocked
• Rewards: Orobyl – Premium currency used for pulling Operators and resources
• Mechanic: Share a unique invite code; returning players link your code to earn rewards

How the Event Works

After unlocking the Event Center, you can generate an exclusive Invite Code on the event webpage. Share that code with friends or community members who qualify as Returning Members. Each time a Returning Member successfully links your code, you earn a set amount of Oroberyl. The code can be linked only once per account and cannot be changed afterward.

Returning Member Eligibility

A player is considered a Returning Member if they are eligible for the Protocol Reconnection event – effectively, players who have been inactive for a certain period. The exact inactivity threshold is not detailed in official materials, but it typically aligns with previous Arknights-type mechanics (e.g., 14 or 30 days).

Should You Participate?

For F2P and low-spending players, every source of Oroberyl matters. This event requires no in-game action beyond sharing a link, making it a zero-risk way to accumulate currency for future banners. Active players who maintain a community or social presence will naturally benefit, but even passive participants can send codes to friends or post on forums. Returning players themselves also receive a bonus Oroberyl just for linking a code, making it mutually beneficial.

This event aligns with the launch or return of major banners. Collecting extra currency now prepares you for upcoming Operator debuts without breaking the bank.

Event Duration and Availability

• Start: With the Homecoming version update
• End: Not explicitly specified – check the in-game event page for the exact countdown.
• Region: All servers, presumably simultaneous. No time zone given.

Since the event runs the entire version cycle, there is ample time to participate. Missing the window, however, means losing this free currency injection.

Tips for Maximizing Rewards

• Coordinate with friends: If you have alt accounts or know inactive players, invite them directly.
• Share in community channels: Reddit, Discord, or in-game guilds. Many players actively seek codes.
• Link early: Returning Members can only link one code. If you want to be the referrer, reach out before they connect elsewhere.
• Check eligibility: If you have been inactive, you qualify as a Returning Member. Use a friend’s code to claim the free Oroberyl bonus.

Final Verdict

Protocol Invitation: The Return is a low-effort, high-reward event that benefits both active and returning players with Oroberyl – the most valuable resource in Arknights Endfield. There is no downside to participating, and the gains can directly accelerate your pull plans for future banners. Make sure to generate your code and share it before the Homecoming version ends.