Arknights: Endfield Phase 2 Update – Test Criteria & Rewards

The second phase of the Contingency Contract: Re-Ignition Experimental Operation limited-time challenge event has arrived for Arknights: Endfield. This update introduces a fresh set of Test Criteria that will push team compositions and strategic planning to new heights. Whether you are chasing higher Total Test Criteria records or aiming to clear the Secret Sanctuary exchange shop, now is the time to dive into the expanded content.

For the latest Arknights: Endfield news and guides, bookmark the Arknights: Endfield game hub.

At a Glance

• Phase 2 starts on June 26, 2026 at 12:00 (UTC+8) for Asia servers; Americas/Europe servers follow UTC-5 rules.
• Five new auto-unlocked Test Criteria are added: Team: Encumbered, Ambient: Time Limit III, Edit: Flashfreeze, Ambient: RE-Construct I, and Ambient: RE-Construct II.
• Participation requires completing Chapter I Process II: Paving the Way and reaching Authority Level ≥30.
• A new Cycle Mission goes live every 3 days (at 04:00 server time), for a total of 7 missions. All challenges and missions remain available until the event ends.
• Secret Sanctuary (reward exchange) stays open until July 23, 2026 at 04:00 server time; unused Vitrified Coins will be cleared after that.

New Test Criteria Details

Each added Test Criteria alters the battlefield in a unique way:

• Team: Encumbered – Likely imposes a team weight or deployment restriction that forces you to streamline your squad.
• Ambient: Time Limit III – Tightens the clock further than previous time restrictions, demanding faster clears.
• Edit: Flashfreeze – Introduces a freezing mechanic; careful positioning and cleanse options will be key.
• Ambient: RE-Construct I & II – Two tiers of a reconstruction modifier that may affect unit durability or enemy behavior.

If a Criteria Set is still locked, its newly added Test Criteria cannot be selected. To unlock a set, you must achieve higher Total Test Criteria records in Phase 1 or through other available means.

Event Mechanics and Rewards

The core loop of Contingency Contract: Re-Ignition Experimental Operation remains unchanged from Phase 1. You can freely combine Test Criteria to boost your Total Test Criteria score and unlock better rewards. The Sanctuary Rating system continues to track your progress, and all earned Vitrified Coins can be spent in the Secret Sanctuary.

Notably, Cycle Missions are refreshed every 3 days (at 04:00 server time). There are 7 cycles total, and all missions remain completable until the event concludes. This staggered rollout encourages regular check-ins but does not penalize late starters—everything stays active until the final deadline.

Important Dates to Remember

All Contract Missions and combat challenges close when the event ends. After that, the Secret Sanctuary exchange remains open for about a month, until July 23, 2026 at 04:00 server time. Once that window closes, any unused Vitrified Coins disappear, so plan your spending accordingly.

Pre-Patch To-Do

• Ensure you meet the participation requirements: clear Chapter I Process II: Paving the Way and reach Authority Level ≥30.
• Review your current Total Test Criteria record; if you are close to unlocking a new Criteria Set, try to push it before Phase 2 lands so you have immediate access to the new criteria.
• Stock up on any materials or team loadouts that may help with the new Ambient: RE-Construct modifiers.

Conclusion

Phase 2 of the Contingency Contract: Re-Ignition Experimental Operation brings meaningful depth to the challenge event. The five new Test Criteria demand fresh strategies, while the extended reward schedule gives players time to grind for all the Vitrified Coins they need. Dive in before the event ends, and keep an eye on those Cycle Missions for extra currency.