Far from it, it all depends on what the developer did in development. You can use
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to edit things in game, but it's a bit complicated.
Instructions (specifically for RPGmaker games made with pre RPGMaker MV engines)
1: Start both the game and cheatengine
2: Load your save in the game
3: Click on the computer icon (upper left corner) in cheat engine and then select the game's .exe from the list that pops up
4: Type in 2*(value you want to change)+1 into the value text box then hit first scan. So if you have 1000 gold and want to change it, type in 2001.
5: Do something in the game to change the thing you want to edit. So for gold buy something, sell something, etcetera.
6: Change the value in the text box based on the 2n+1 formula then hit next scan. So if your new gold value is 900, type in 1801.
7: Repeat steps 5 and 6 until you only have 1 entry in the address list on the left side of the has only 1 entry left.
8: Double click on the entry on the address on the left which will place it into the list at the bottom of the window.
9: Then you can double click on the value for the address in the list at the bottom of the screen and change it, again according to the 2n+1. So if you want 100000 gold you'd change it to 200001.
You can save the game at any time during the progress, but loading the save or restarting the game means you have to start from the beginning of the scanning steps. If you want to change another thing, just click new scan and start from the first scan step again. You may also end up with multiple addresses in the list in step 7, which usually means the game has 1 value for the actual thing while the other is just a display value, so you'd have to test a bit for which one is the actual one to change.
It's a bit tedious, and changing sex values probably won't work for any oneone game since a lot of them have more intricate code for changing multiple values. You may also want to make a backup of your saves just in case before doing this, just in case.
