- Lost and Found Co 100% completion requires all story requests, hidden objects, optional quests, collectibles, and all 29 Steam achievements.
- Missable content is concentrated in optional discoveries and hidden interactions, not the main story.
- Chapter-by-chapter checklists prevent repeated scene replays and backtracking.
- Room decoration ties into the collection loop — check Ducky's room after each objective.
- No missable story achievements mean a cleanup pass after the credits is viable.
What 100% Completion Includes in Lost and Found Co
Reaching full completion in Lost and Found Co means far more than finishing Mei and Ducky's story. The game layers several completion tracks on top of the main progression, and each one must be cleared before your save file counts as truly finished.
The game launched on Steam on March 5, 2026 and ships with 29 achievements across story, scene-completion, and optional-discovery categories. Because most story achievements unlock automatically, the real challenge lies in the optional layer: hidden objects revealed through interactions, side requests, Juju collectibles, and room decoration goals.
Open the achievement list before your first chapter and sort entries by category. Knowing which goals are optional from the start prevents the most common cause of a second full playthrough.
| Completion Track | Description | Missable? | Est. Share of Playtime |
|---|---|---|---|
| Main story requests | Complete every customer request and story beat | No | ~50% |
| Scene searches | Submit all requested objects per scene | Usually no | ~20% |
| Optional quests | Side requests and additional objectives | Potentially | ~15% |
| Collectibles | Juju, special items, hidden interactions | Yes | ~10% |
| Decoration | Furniture and room customization for Ducky | No | ~5% |
Collectibles and hidden interactions are the most commonly missed category. Check the object-location list for a scene before leaving it for the last time.
Completion Route: Chapter-by-Chapter Order
The most efficient route treats each chapter as a self-contained block. Clear the story request, finish the hidden-object search, then sweep for optional content before advancing.
Revisiting scenes later is possible for most content, but a per-chapter sweep is faster than a full endgame cleanup across every location in Plumville.
Story-First Pass
- Complete the active customer request
- Solve scene-specific puzzles
- Advance the Mei and Ducky storyline
Search Sweep
- Clear all listed hidden objects
- Check containers, shelves, corners
- Use interactions to reveal concealed items
Optional Sweep
- Trigger side requests in the area
- Collect Juju and special items
- Test unusual environmental interactions
Step-by-Step Full Completion Workflow
Follow this workflow for every scene in the game. It front-loads reading, systematizes the search, and locks in optional progress before you move on.
Read the full request list
Open the current customer request and identify every required object. Separate mandatory items from optional discoveries so nothing is skipped during the search.
Search the scene systematically
Sweep from one side of the scene to the other. Check foreground and background layers, shelves, containers, and corners. Match shapes and silhouettes rather than expected positions.
Complete interactions
Click furniture, open containers, and examine interactive elements. Some requested and collectible objects only appear after a scene interaction or mini-puzzle is resolved.
Sweep optional content
Before leaving, trigger any side requests in the area, collect Juju, and test unusual interactions. Mark each entry complete on your tracker.
Verify and advance
Confirm the request is complete, check the achievement list for newly unlocked entries, and visit Ducky's room to review new decoration options before moving on.
Search independently before using hints, and save hints for the final stubborn object. Hints are most valuable after obvious items are cleared and only one or two remain.
Achievement Planning for 100%
All 29 achievements fall into four planning groups. Sort your run by missability so the optional work happens during the story instead of after it.
| Achievement Category | Unlock Condition | Missable | Recommended Timing |
|---|---|---|---|
| Main progression | Complete story section or customer request | No | Earned naturally |
| Scene completion | Finish required searches, submit objects | Usually no | Clear each scene before advancing |
| Optional objectives | Locate optional objects, extra goals | Potentially | Check object list before leaving each scene |
| Completion goals | Combine story, search, and optional targets | Varies | Chapter checklist plus final cleanup pass |
If you missed optional content during the story, most scenes can be revisited after the credits. Run a final sweep chapter by chapter using your achievement list as the roadmap.
100% Completion Checklist:
- Complete all main story requests with Mei and Ducky
- Clear every hidden-object search in each scene
- Finish all optional side requests and additional objectives
- Collect every Juju and special item
- Unlock all 29 Steam achievements
Tools, Tips, and Common Mistakes
Players most often miss completion by leaving scenes before optional sweeps, clicking randomly instead of searching in sections, and forgetting to revisit previously explored areas after new progression unlocks access.
| Tip | How It Helps | When to Apply |
|---|---|---|
| Read requests fully first | Prevents missed mandatory items | Before every search |
| Section-by-section scanning | Finds blended background objects | During every search |
| Interaction checks | Reveals concealed items | When an item is not visible |
| Post-progression revisits | Surfaces newly accessible content | After each chapter |
| Room decoration review | Tracks collection progress visually | After each objective |
FAQ
Q: How long does 100% completion take in Lost and Found Co?
Exact playtime varies by player, but the optional layer — side requests, Juju collectibles, and hidden interactions — adds a meaningful amount of time on top of the main story. Most of the extra effort comes from sweeping scenes for optional discoveries rather than the story itself.
Q: Can I clean up missed content after finishing the story?
Yes. Most story achievements unlock automatically and are not missable, and previously explored scenes can generally be revisited. A post-credits cleanup pass using the achievement list as a roadmap is a viable path to 100% completion.
Q: Are any of the 29 achievements missable?
Story and most scene-completion achievements are not missable. The risky categories are optional objectives and collectibles tied to hidden interactions — these should be checked before leaving a scene for the last time to avoid extra replays.
Q: Does room decoration count toward 100% completion?
Room decoration is part of the ongoing collection and customization loop, and some completion goals reference it. Treat Ducky's room as a visual progress tracker and review new decoration options after completing each objective.