Botany Manor

This can be your very first achievement, once you spawn in simply don't touch anything and try to open the glass doors at the end of the room you're in and it will pop, then you can pickup the parcel/book. If you already passed this point and grew the windmill flower leave the greenhouse at the end of the path go to the left to a locked gate, attempt to open this gate and achievement should pop, then turn around and go get the key from the gatehouse to open the gate and continue the game.

Interact with any locked door when you don't have the key for it to unlock this achievement.
Can be done on the very first locked door after the first room before picking up it's key from the main gate.

100% complete all achievement guide:

Extended timestamps:
00:00:00 - Chapter 1: A Fresh Start
00:03:25 - "Windmill Wort" Achievement
00:04:30 - "In The Bin" Achievement
00:04:45 - "Green Thumbs" Achievement
00:05:40 - "Take a break" Achievement
00:06:05 - "Take A Nap" Achievement (stay on bench for one minute or more)
00:06:30 - "Let me in!" Achievement

00:07:35 - Chapter 2: Survivors of Adversity
00:08:45 - "Piano Woman" Achievement
00:14:15 - "Boom" Achievement
00:15:15 - "Fulguria" Achievement
00:16:25 - "Crack" Achievement
00:17:00 - "Ash Plume" Achievement
00:17:50 - "Photographer" Achievement

00:19:35 - Chapter 3: Peculiar Petals
00:21:15 - 01/10 Paintings
00:22:05 - "History Sleuth" Achievement
00:23:45 - "Fixer Upper" Achievement
00:28:50 - "Pixie Tears" Achievement
00:30:40 - "Wolfglove" Achievement
00:31:00 - "Mountaineer" Achievement
00:33:55 - "Lockpicker" Achievement

00:34:30 - Chapter 4: Botanical Allies
00:34:40 - "Grandma's Vault" Achievement
00:35:10 - 02-09/10 Paintings
00:37:40 - "Sapphire Gloom" Achievement
00:43:10 - "Clean and Tidy" Achievement
00:43:20 - "Who needs a plumber?" Achievement
00:47:50 - 01/05 Ducks
00:47:55 - "Quack Quack" Achievement
00:49:35 - "Nightfall" Achievement
00:52:20 - "Cradle Fern" Achievement
00:54:25 - "Brook Chalice" Achievement
00:55:50 - 02/05 Ducks
00:56:25 - 03/05 Ducks
00:56:40 - 04/05 Ducks

00:58:35 - Chapter 5: Climbing Up
01:00:25 - 10/10 Paintings
01:00:30 - "Art Lover" Achievement
01:00:40 - "Frogger" Achievement
01:06:35 - 05/05 Ducks
01:06:40 - "Quack Quack Quack Quack!" Achievement
01:10:40 - "Help?" Achievement
01:15:05 - "Botanical Researcher" Achievement
01:18:43 - "Springdance Shrub" Achievement
01:21:30 - "Fool's Emerald" Achievement
01:25:30 - "Oscilette" Achievement
01:25:45 - "Flower Arranging" Achievement
01:27:10 - Ending
01:28:00 - "The End" Achievement
01:28:15 - Subscribe!

This can be done by trying any locked door in the game that you haven't picked up the key yet. I got this at start of chapter one by trying the main gate to get into the manor before I had visited the gatehouse and picked up the key but any locked door will get you it.

This guide will walk you through all of the achievements and explain the solutions in under 2 hours, timestamps are below the video


ACHIEVEMENTS LIST TIMESTAMPS

0:00 – Intro
0:35 – Chapter 1
1:29 – Windmill Wort Achievement
3:55 – In the Bin & Green Thumbs Achievements
5:25 – Take a Break & Take a Nap Achievements
6:45 – Let me In! Achievement
7:45 – Quack Quack Achievement (Duck 1/5)
8:02 – Chapter 2
8:22 – Fulguria Achievement
12:38 – Boom Achievement
13:20 – Piano Woman Achievement
13:50 – Ash Plume & Crack Achievements
19:25 – Duck 2/5
19:50 – Photographer Achievement
21:50 – Chapter 3
22:32 – Pixie Tears Achievement
28:03 – History Sleuth Achievement & Art Lover (Painting 1/2)
33:20 – Duck 3/5
33:45 – Fixer Upper Achievement
35:25 – Wolfglove and Mountaineer Achievement
39:20 – Lockpicker Achievement
40:45 – Chapter 4
41:05 – Grandma’s Vault Achievement
43:12 – Sapphire Gloom Achievement
47:30 – Who Needs a Plumber & Clean and Tidy Achievements
51:16 – Some chapter 4 clues
55:26 – Duck 4/5
55:46 – Nightfall Achievement
58:41 – Cradle Fern Achievement
1:01:00 – Brook Chalice Achievement
1:04:50 – Chapter 5
1:05:48 – Art Lover Achievement (Painting 2/2)
1:07:00 – Frogger Achievement
1:08:04 – Some chapter 5 clues
1:13:32 – Quack Quack Quack Quack! Achievement (Duck 5/5)
1:14:05 – Help! And Achievement
1:14:55 – Oscilette Achievement
1:18:00 – Fools Emerald Achievement
1:21:31 – Springdance Shrub Achievement
1:28:10 – Botanical Researcher Achievement
1:28:56 – Flower Arranging Achievement
1:40:49 – The End Achievement

Very quick and easy, attempting to open any locked door or gate (interacting with the E key) will pop this achievement. From Chapter 2 onwards you will encounter many locked doors and gates, so this is unmissable with gameplay.

Happy playing!

Interact with any locked door when you don't have the key for it to unlock this achievement.
Can be done on the very first locked door after the first room before picking up it's key from the main gate.

100% complete all achievement guide:

Extended timestamps:
00:00:00 - Chapter 1: A Fresh Start
00:03:25 - "Windmill Wort" Achievement
00:04:30 - "In The Bin" Achievement
00:04:45 - "Green Thumbs" Achievement
00:05:40 - "Take a break" Achievement
00:06:05 - "Take A Nap" Achievement (stay on bench for one minute or more)
00:06:30 - "Let me in!" Achievement

00:07:35 - Chapter 2: Survivors of Adversity
00:08:45 - "Piano Woman" Achievement
00:14:15 - "Boom" Achievement
00:15:15 - "Fulguria" Achievement
00:16:25 - "Crack" Achievement
00:17:00 - "Ash Plume" Achievement
00:17:50 - "Photographer" Achievement

00:19:35 - Chapter 3: Peculiar Petals
00:21:15 - 01/10 Paintings
00:22:05 - "History Sleuth" Achievement
00:23:45 - "Fixer Upper" Achievement
00:28:50 - "Pixie Tears" Achievement
00:30:40 - "Wolfglove" Achievement
00:31:00 - "Mountaineer" Achievement
00:33:55 - "Lockpicker" Achievement

00:34:30 - Chapter 4: Botanical Allies
00:34:40 - "Grandma's Vault" Achievement
00:35:10 - 02-09/10 Paintings
00:37:40 - "Sapphire Gloom" Achievement
00:43:10 - "Clean and Tidy" Achievement
00:43:20 - "Who needs a plumber?" Achievement
00:47:50 - 01/05 Ducks
00:47:55 - "Quack Quack" Achievement
00:49:35 - "Nightfall" Achievement
00:52:20 - "Cradle Fern" Achievement
00:54:25 - "Brook Chalice" Achievement
00:55:50 - 02/05 Ducks
00:56:25 - 03/05 Ducks
00:56:40 - 04/05 Ducks

00:58:35 - Chapter 5: Climbing Up
01:00:25 - 10/10 Paintings
01:00:30 - "Art Lover" Achievement
01:00:40 - "Frogger" Achievement
01:06:35 - 05/05 Ducks
01:06:40 - "Quack Quack Quack Quack!" Achievement
01:10:40 - "Help?" Achievement
01:15:05 - "Botanical Researcher" Achievement
01:18:43 - "Springdance Shrub" Achievement
01:21:30 - "Fool's Emerald" Achievement
01:25:30 - "Oscilette" Achievement
01:25:45 - "Flower Arranging" Achievement
01:27:10 - Ending
01:28:00 - "The End" Achievement
01:28:15 - Subscribe!

if you see any locked door attached on the lock and the achievement should pop