Arknights: Endfield – Long Ear Invitation Puzzle & Chest All - Arknights: Endfield

Long Ear Invitation Puzzle Guide – Arknights: Endfield (2026)

Arknights: Endfield's Delver of the Cryptic event stands out for its inventive puzzle stages, but few are as deceptively simple—and ultimately rewarding—as the Long Ear Invitation. With players worldwide exploring patch content since 2026-02-26 (exact server reset times not stated in official materials), this guide provides a step-by-step breakdown to maximize your rewards and avoid common missteps, whether you're F2P or optimizing every resource.

At a Glance

Event: Delver of the Cryptic — Long Ear Invitation Puzzle
Availability: Launched 2026-02-26 (regional resets may vary; check in-game notices)
Primary Objective: Reach the exit by following a single long-ear
Bonus Goal: Find and guide all six long-ears to their hideouts for full rewards
Recommended for: All players seeking event completion rewards; no stamina/currency cost for entry stated

How Long Ear Invitation Works

On paper, Long Ear Invitation is a navigational task: follow a long-eared creature to the stage’s exit. However, for the puzzle’s bonus rewards and to achieve full event clearance, you must locate and escort all six long-ears to their designated hideouts, requiring sequential awareness, environmental interaction, and a sharp eye for branching paths.

Estimated Stage Duration: 5–12 minutes on first clear (may vary by exploration speed).

Step-by-Step Solution & Visual Guide

1. Starting Sequence

Three long-ears appear near the entrance. Follow them.
The right-most long-ear enters its hideout almost immediately (that’s your first count).
The other two split—make note of their directions as you’ll need to track their paths later.

Suggested Visual: Map overlay showing initial spawn points with arrows tracing the first split. Alt text: "Stage map highlighting the branching points of the first three long-ears."

2. Navigating Obstacles & Unlocking Additional Paths

One long-ear will duck behind a breakable wall—look for an explosive barrel nearby. Use it to clear the wall.
Inside, you’ll find your second long-ear at their hideout.
Return outside and follow the remaining long-ear; after another split, two will reach dead ends (record both spots for later).

3. Progressing Deeper & Managing Barriers

Advance along the only viable path—eventually, you’ll spot another hideout from a distance.
Guide the third long-ear to this location.
Encounter a barrier segment: three laser grids block your path, but an explosive barrel is accessible.
Throw explosives at the three switches: one is behind crates next to the lasers; two are above and stacked on the far side.
This clears the way to the fourth long-ear hideout.

Suggested Visual: Close-up of the laser barrier puzzle mechanics. Alt text: "Barrier section with labeled switch and explosive barrel positions."

4. Securing the Final Long-Ears

Proceed through the newly unlocked path, encountering two final long-ears.
- One escapes via a pipe (unreachable).
- The other enters a mini-facility—activate the switch outside to drop the interior laser grid.
- Head to the upper floor, detonate the barrel to open the switch, then descend; this completes long-ear number five.
To obtain the sixth, use the facility’s barrel to break down an exterior wall, revealing the last long-ear's hiding spot. Escort it to the finish.

Event Rewards & F2P Optimization

Full clear (all six long-ears): Highest-tier event resource rewards (exact list varies; not stated in official materials).
Partial (single exit): Only base completion rewards—not optimal.
No additional runs are required after a perfect clear.

Tips for F2P & Low-Spend Players

No stamina/currency cost means unlimited attempts—take your time exploring, but focus on puzzle efficiency rather than brute-forcing all routes at once.
Use environmental clues: barrels, switches, and dead ends always indicate a puzzle solution.
Don’t skip the bonus goal; delaying full event completion means missing temporary event shop resources that can be critical for future pulls.

Common Pitfalls & Troubleshooting

Missing a long-ear: Most commonly occurs at split points—if only five found, systematically revisit dead ends. Long-ears do not backtrack.
Stuck at barriers: Check for missed switches and use barrels deliberately.
Order doesn’t matter for rewards as long as all are found before exiting.

Next Steps & Event Progression

Once you’ve cleared the Long Ear Invitation with full rewards:
– Progress to the next Delver of the Cryptic puzzle stages (see Industrial Labyrinth Guide in Arknights Endfield (Delver of the Cryptic Event) for related solutions).
– Spend any event currencies before the shop closes (event end date not specified; check in-game timer for local server TZ).
– Begin preparing for upcoming event banners and story chapters, as new content likely depends on having cleared these puzzle stages.

FAQ

Question	Answer
Are clear rewards time-gated?	Not stated in official materials; check event banner.
Is there an optimal route order?	No, but following splits as described avoids confusion.
Can stages be repeated for more loot?	Only base clear rewards are repeatable, not bonuses.
Are there platform/server differences?	None specified; monitor patch notes for changes.

Key Takeaways

The Long Ear Invitation puzzle is a highlight of Endfield’s event design—rewarding thoughtful exploration over speed. Prioritize the bonus objective to maximize event rewards, and use this experience to anticipate future puzzle mechanics elsewhere in Arknights: Endfield. For additional puzzle, team composition, or material farming advice, check out EarlyGG’s Endfield Tier Lists and event hub.

For official updates and latest event schedules, always consult the Arknights: Endfield official site.