We will be using a copy of Paradise as an example.
You try to run the game, you get an error about the app not being verified.
You can now click "Open" and the app will launch without a warning.
---
Some games made with RenPy need additional work.
Step 1. Right-click the renpy file and click the Show Package Contents option.
Step 2. Open the Contents folder and find the MacOS folder. Inside there should be a file with the game's name.
Step 3. Double-click on the file in from Step 2, and you should see a Terminal window pop-up, then the game will launch.
If Step 3 worked and the game launched, you can proceed to Step 4
Step 4. Create a new folder called "autorun" inside the Resources folder. Copy or move the "game" and "renpy" folders into the new autorun folder, then do the same for the game's .py file and .sh file to the same location. You can now run your game app file like a normal app!
If the above doesn't work for you, there may be a permissions issue with the files. Follow these steps to fix it:
Step 1. Open Terminal.app in your computer's Utilities folder.
Step 2. Type "cd " (including the space, excluding the quotes) and then drag-and-drop the folder of the game into your Terminal window, and press enter.
Step 3. Copy & paste the following code into your terminal and press enter.
find . -type f -exec grep -Il "#\!" {} \; | xargs chmod u+x