此攻略給懶惰且想快速走過遊戲來完成全成就的玩家。

攻略路徑參考自 Sierra Lee 的 Decanter's Guide to Crimson Gray，加以修改並增加 S/L 以便加快速度。別忘了進 Options 把 Skip 設為 All
　

　
R18 補丁可以在開發者部落格找到，以下部落格連結：
http://the-last-sovereign.blogspot.com/p/crimson-gray.html

或是直接補丁的檔案連結：
https://mega.nz/#!DxUhjQoA!STJ9IJCs234gDCHMOpew4Id37fnV8wwbxff5T16YUnc

使用 R18 補丁與否，並不會影響到成就的取得。
　

　
Start Game
=> {Achievement: Definitely Romance}

Smile at her
[Save 1]
Tell Mrs. Smythe
=> {Achievement: A Special Kind of Romance}
Let her down gently
Talk to Lizzie
Research in the library
[Save 2]
Yandaquel
No, she's sort of stalking me
No
Take her hand
Beg
Beg for release
Try to remove chain
Request old medication
Look for weapons
Start a conversation about her interests
Make something for Lizzie
Kiss her
Don't try anything
Hint you're worried about Lizzie
=> {Achievement: Not Like This}

[Load 2]
Don't take anything
=> {Achievement: Unsurprising Outcome}

[Load 1]
Leave a note
Cautiously say yes
Talk to Lizzie
Talk to pharmacist
Nihlazine
Yes, we're dating
What kind of question is that?
Just keep talking
Take her hand
[Save 3]
Sleep with Lizzie
Accept choice
I want whatever you want
Start a conversation about her peers
Say positive things about Lizzie
Ask Mrs. Smythe how to stabilize a person
Raise the issue bluntly
Answer honestly
[Save 4]
Run to the police
=> {Achievement: Alone}

[Load 4]
Help her hide/Help her escape
=> {Achievement: Happiness}

[Load 3]
Convince Lizzie to wait
Reason with her
Look for tools
Request old medication
Look for tools
Start a conversation about morality
Make something for Lizzie
Disagree
Use crowbar to escape shackles
Stay in the basement
[Save 5]
Ask for more Paxetine
=> {Achievement: Caretaker}

[Load 5]
Lie about everything
=> {Achievement: The Right Path}
=> {Achievement: True Ending}
Burning tree
=> {Achievement: Completion}
　

　
這個成就在討論區有不少人遇到問題，開發者自己本身看來是無解/不知道理由。

像如果最後選擇 Living tree 就有可能觸發這個問題，明明所有 CG 都拿到了（照上面流程攻略都會拿到），但是成就「Completion」卻沒有解開。

其中解法很簡單：
關閉遊戲 > 啟動遊戲 > 選「Start」

這樣成就「Completion」就能解開了。