If you just want the achievements.
I have the "Male-Savefiles" for this guide.
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Copy the savefiles in "C:\Users\%USERNAME%\AppData\LocalLow\Eek\House Party\Saves"
There is a file "HP Saves.txt" in which I made an order to finish everything in a better oder than in the guide.
I don't have the "Female-Savefiles".
I speedrunned the female-playtrough for the last achievements (Sorry).