100% Achievements and Missable Cleanup Checklist

In Moomintroll: Winter's Warmth, the scariest 100% moment is not a hard puzzle. It is standing near the Great Winter Bonfire with the valley glowing, everyone nearly safe, and one tiny note, candle, vase piece, or snowball target hiding in the snow like Little My with a plan. Use this section as your final ledger before spring starts tugging at the edges.

A winter being is one of the strange little winter residents who asks for help. The Great Winter Bonfire is the big late-story bonfire that moves the ending route forward. If you want a clean one-run completion, do not treat that bonfire as a casual checkpoint. Finish the cleanup below first, because this checklist does not assume free cleanup after the ending.

Best 100% Cleanup Timing

Opening cleanup: light a match, warm the house, inspect the vase, and follow the squirrel route.
After mittens: start snowball tracking right away. Hit any valid character for Catch!, and hit the squirrel whenever it is targetable for Cold Critter.
After shovel, axe, sharp axe, and upgraded shovel: sweep old blocked paths for vase pieces, firewood, winter beings, letters, and cave routes.
Before lighting the Great Winter Bonfire: finish every optional checklist item you care about. The bonfire needs 125 firewood, five guests, one musician, and three winter being tasks for story progress, but 100% needs more than that.
Final stretch: finish the story only after Great Shot, You've Got Mail!, Spelunker, All Fired Up, Friend of Winter, Upgrades!, and Moominmamma's Favorite are handled or clearly accounted for.

All 23 Achievements

Achievement	Unlock requirement	Category	Best timing
Darkness, Meet Your Match!	Pick up the matches and light a match.	Story / tool	Opening Moominhouse
Warming Up	Restart the furnace and heat Moominhouse.	Story	Opening cellar route
Frozen Farewell	Progress the early squirrel and storm sequence.	Story	Early story
Catch!	Throw a snowball at any valid character after getting mittens.	Snowball	As soon as snowballs unlock
Cold Critter	Throw a snowball at the squirrel when the game lets you target it.	Snowball / missable-risk	Early squirrel route or late squirrel rescue moment
Great Shot	Throw a snowball at every snowball-valid character or character group.	Completion / snowball	Track all game; finish before final route
Nicest of Neighbours	Help Fillyjonk and her family.	Story / character help	First major guest route
Silver Linings	Catch Little My during her silver tray snowball/chase route.	Story / character help	Misabel and Little My route
Little Miss Moominvalley	Complete Misabel's makeover and confidence route.	Story / character help	Moominhouse guest chain
Cozy Camper	Meet Joxter and progress his camp route.	Story / character help	Mid story
Family Reunion	Find and rescue Fillyjonk's children.	Story / rescue	Forest family route
Part of the Pack	Save Sorry-oo from the wolves.	Story / rescue	Late forest route
Firestarter	Light the story bonfire.	Story / bonfire	Only after cleanup checks
Darkest Depths Delver	Enter the underground route after the bonfire sequence.	Story	After Great Winter Bonfire
What Friends Are For	Complete the late rescue sequence involving Too-ticky.	Story / rescue	Late story
Winter's Warmth	Complete the game.	Ending	After all desired cleanup
Spelunker	Light every candle in the cave and underground routes.	Cave completion	During cave sweep before ending
All Fired Up	Light every bonfire, including the small winter-being fires.	Fire completion	Late cleanup before bonfire commitment
Friend of Winter	Help every winter being, not just the three needed for the Great Winter Bonfire.	Side quest completion	Before final story route
You've Got Mail!	Read or find every letter and note in the full paper chain.	Collectible	Track all game; finish before ending
Upgrades!	Improve every tool through Too-ticky when upgrade materials are available.	Tool completion	After final upgrade material cleanup
Moominmamma's Favorite	Collect all 25 vase pieces, then fix Moominmamma's vase.	Collectible completion	Late cleanup after side quest rewards
Snufkin Would Be Proud	Complete all other achievements.	100% completion	Final unlock

Pre-Bonfire 100% Checklist

Vase pieces: collect all 25 pieces and fix the vase for Moominmamma's Favorite. Remember that some pieces come from birds, caves, snow piles, blocked paths, and side quest rewards.
Letters and notes: finish the full mailbox, bottle/water, mountain, pond, forest, cave, return-mailbox, and late follow-up chain for You've Got Mail!.
Winter beings: help every winter being for Friend of Winter. The Great Winter Bonfire only asks for three winter being tasks, so do not stop there.
Tool upgrades: confirm the full tool path is done: matches, scarf, mittens, shovel, reinforced mittens, dash, axe, longer-lasting matches, sharp axe, and upgraded shovel. For Upgrades!, bring upgrade materials such as sturdy yarn, lamp oil, whetstone, and scrap metal to Too-ticky when the game allows it.
Cave candles: sweep the herb cave, bridge rooms, side rooms, rope routes, cave family areas, and late underground paths for Spelunker.
Bonfires: light every interactable fire spot and small bonfire you find, including winter-being fires, for All Fired Up.
Snowball targets: for Great Shot, throw snowballs at every valid character or group as you meet them. Recheck the squirrel, Ancestor, Too-ticky, Little My, Fillyjonk, Fillyjonk's children, Misabel, Hemulen, Joxter, the musician, winter beings, the cave mouse or rat family, Sorry-oo, Shadow, and late bonfire guests if the achievement is still missing.
Great Winter Bonfire progress: before lighting it, make sure you have 125 firewood, five guests, one musician, and at least three winter being tasks complete, then pause and run this full checklist once more.

If One Achievement Is Missing

If Snufkin Would Be Proud does not unlock, one of the other 22 achievements is still unfinished. Start with the quiet troublemakers: Great Shot, You've Got Mail!, Spelunker, All Fired Up, Friend of Winter, Upgrades!, and Moominmamma's Favorite. Those are the ones that hide behind small interactions while the story keeps moving warmly along.

Missing vase progress: use All 25 Vase Piece Locations. Check side quest rewards, bird drops, cave pieces, snow piles, and late tool-gated paths.
Missing letters or notes: use Letters, Notes, and Cave Candle Locations. Revisit mailbox steps, bottle/water clues, mountain notes, pond notes, forest notes, cave notes, and late follow-ups.
Missing cave or fire achievements: use Letters, Notes, and Cave Candle Locations for candles, and Great Winter Bonfire Requirements and Final Cleanup for small bonfires and fire spots.
Missing winter being credit: use Puzzle Solutions for Side Quests and Winter Beings. Do every winter being task, even after the bonfire requirement says you have enough.
Missing tool credit: use All Tool Upgrades and Blocked Path Unlocks. Check Too-ticky turn-ins and confirm every improved tool is actually upgraded, not just owned.
Missing snowball credit: use Little My Snowball Fights and Great Shot Targets. If in doubt, make one calm lap through the current cast and snowball every valid target again. It is very Moominvalley to solve a serious ledger problem with a snowball.

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