The creation fo the world I (missable..theoretically)
right at the start of the game read the note by the big statue before interacting with the fireplace

A hot swirl
interact with the first fireplace

From here you have a freedom to roam around and choose other fireplaces to solve in any order, although some passages and solutions are blocked by events at some others. Map to tell fireplaces apart might come in handy.
first letters denote what season a fireplace is active in: W - spring("wiosna", not "winter", it's not english folklore :) ), L - summer("lato"), J - autumn/fall("jesień"), Z - winter("zima")
dots are places of interest connected to achievements


The Witches' gorge
Go through the mire leading in and out of a cave under the great tree. Should come by itself after you exit the scene of the Rarog's egg thief(summer LJ), go through the waterfall and take a few steps outside (unless you skipped that by going to another time)

Collector of moments
South of Miras house the path ends on top of a cliff with a lovely view of Dalim and Nadimirs..barn. Yes, house too, but the barn is more visible(I unlocked this in autumn, but don't think it depends on season)

Valtteri
South of the western bridge the path splits with some routes going down to the river, one down to the cemetery and one going up a small hill - when you approach that a spirit of a small boy will appear followed by rather modern gunshots. Go after him to an early 20th century radio where he fill fall. Use the radio, then pick up the note that appears in front.

The explorer
past the western bridge over the river there is a path leading downwards to the river, where you can hear a big waterfall. Two paths in fact - one on one side where you can see that waterfall, a second on the other side - I got the achievement when I went all the way down the latter. Basically when you cross rickety old bridge turn right. If that's not the right way cross it again and try the right path there(I got it in autumn, but don't think it's season dependent)

Wall conqueror
Walk on top of a wall. Outside the Witches Gorge (south of the great tree) there's a wall that passes over the stream and has a ramp on one side sloping down onto a nearby path. Use that ramp to walk onto the wall and walk over to the other side. I didn't test it, but it's also possible to get onto the long wall overlooking the western edge of the lake under the great tree


Svarog
Finish the game - you get it at the end of the finishing cinematic


A return to the past
do NOT skip the credits after finishing the game

Kupala night
clear the smoke and light up the fire at the (Kupala)night party by the river (LR)


Legend of the Fern flower (missable..or is it?)
after the Kupala(LR) night signs on totems will lead you towards the search for the fern flower(LP). One of the totems will have a bigger note attached - just pick it up and read it

Lust for wealth
Clear all the smoke and light up the fire at the search for the fern flower event at the great tree(LP)
this may come in handy if your memory is poor, but try to find and arrange all the notes yourself first:


Will o' the wisps
Along the way to the search for the fern flower(LP) pick up a burnt drawing attached to a branch under a stone arch

Rarog's egg thief
After the search for the fern flower event(LP) if you pick up Rarogs feather from the lit fireplace you'll be transported into a cave under the great tree(LJ) - just solve the event there. You'll find getting out of there difficult without that anyway

Sap-sprinkled love
Clear all the smoke and light the fire in front of Miras house in summer(LM)


Painful truth
Clear all the smoke and light the fire just before Dalim and Nadimirs house in summer(LD). You will need a key to the house which gets left behind by Nadimir after completing Sap-sprinkled love (see previous achievement)

Forefathers' Eve
Clear all the smoke and light up the fire at the cemetery event(JC)


Mushroom picking[MISSABLE]
During the cemetery scene this popped up after "talking" to one of the statues of Veles while drugged with the mushroom potion. It's possible that this requires "talking" to all of the statues and pops up on the last. There's 6 statues 2 by the entrance from the houses side, 1 in the middle serving as the main altar, 1 on a sort of cairn a bit behind the main one, 1 with a language mushroom sticking out of it, and 1 with a note next to it. It might also be needed to "talk" to a painted girl statue near beehives

Veles
Southwest corner of the map, cemetery(JC), by one of Veles' statues there's a note about this deity. Just pick it up and read. It's not tied to the fireplalce, but I didn't see the statues in other seasons than autumn

Who lives in the well
Clear all the smoke and light up the fire by the well(JS) on the path to Miras house(JM, during autumn, the house is on a hill on the north side of the river, you may need to go around the other side through the cemetery if you didn't at least help build the main bridge during spring (WK), once you cross the river just follow the buckets that lead to the north side of the main bridge and up a hill)

The creation of the world - Part II
read the note attached to a bench in front of a painting spot south of Miras house(JM). It's not part of the fireplace, but appears only during autumn

The revival of a burning love
relight the fireplace by a painting stall south of Miras house(JM). The painting is all there is to it

The Witch
In autumn, just north of the main bridge the road starts going up a hill and just before that, on the lower slop there is a tree and behind it a rock on which lies a broom. It's rounded at the end so looks more like a club. If you look back you'll notice the top of the cliff (JM is on top of it) looks like a witches profile. Pick up the broom to hear the witch laugh and get this achievement.
Screen below if you still can't find it.


What's hidden in the well
Where the river makes its first big turn to the north just north of Dalim and Nadimirs house there's a slope to get down to the water level. During autumn go there and read a note on a big stone on the shore

Loneliness
In autumn at the site where the search for the fern flower took place (LP) pick up a burned drawing from a piece of wall by the water, very close to the fireplace

A blazing bond
Clear all the smoke and light up the fire at Dalims workshop(JW)

Domovoy fan[MISSABLE]
when solving Domovoys riddle during the winter event at Dalims (now Mira and Nadimirs) house (ZD)..actually fail it a few times and he'll sing you a song. It's enough to start with a right turn. Repeat until you get all of them - there's 5 in total

Koliada
Clear all the smoke and light up the fire at Dalim and Nadimirs house in winter(ZD)
don't worry about the chest yet because the key is at the next fireplace - a rescue journey
if you have a problem finding the right moves just make a few wrong turns with the lever and endure Domovoys songs - a solution written plainly on paper will appear after you've heard them all

Monsters' mucus
Find the dead water child and alchemy equipment on a rock by the river. Between the locations of both river fireplaces(LR and WR). It should trigger when you get close enough and just see it.

A rescue journey
Clear the smoke and light up the fire at the stone arch in winter(ZA)
..also enjoy the runing back and forth between this place and the house on the opposite end of the map :P

Leshy
Clear all the smoke and light up the fire at the ruins where search for the fern flower took place - but this time in winter(ZP)

Mother
Clear the smoke and light up the fire in the cave under the great tree in winter(ZJ). Requires an item from the river fireplace from spring(WR), which means this is the very last fireplace in the game..except maybe for the one with the infinity sign which both begins and ends the whole thing

Weeping birch
Clear all the smoke and light up the fire at the birch grove (WB)


Beaver breeder
along the road in front of the main bridge there are some fallen trees(near WB). Some of them closest to the bridge site can be interacted with to reveal some personal lore..and this achievement

Revival festival
Clear all the smoke and light up the fire at Dalim and Nadimirs house(WD) during spring. Includes following a trail of drawings. Try not to step in dung next to the barn, you may get stuck

Mare
Clear all the smoke and light up the fire at Miras(or Izbors at this point, WM) house in spring. You don't have much choice - once you enter you can't get out until you at least banish the mare

Destiny
pick up a burnt drawing in the woodworking workshop in front of Miras (future) house(WM) during spring

Flood
Interact with a boot hanging from a high tree stump above the shore between the main bridge and the path leading to the river events(nearby WB)

Kupala Night surprise
Clear all the smoke and light up the fire at the quarry close to the river(WK), you will need an item from Dalims house from summer

The birth of a new life
Clear all the smoke and light up the fire at the river in spring(WR) - this requires feathers from almost all the other fireplaces, practically making it the pre-last fireplace in the game