If you dont own the game and are pirating it, please buy the game:
https://psteamproxy.yuanyoumao.com/app/1451480/

Open this directory:

Edit:The path for linux is `$HOME/.config/unity3d/FishSoft/Penguin Heist`

Credit to YoshiRulz
Thanks YoshiRulz,very cool



Open "PHSaveMain.sav" using either "Notepad++" or "Notepad(Windows)"
Press Ctrl+F
Search for "@money@"
When you find "@money@(number)" replace it with "999999"

You are now rich!

Search for @itemOwned
Change "0" in "@itemOwned (number)@0" with "1"
(for every single "@itemOwned (number)@0")

Now you have every weapon in the game!

Congratulations! You are now rich and have every weapon in the game!

(if you had issues doing it comment it down below)