This mod is a great tool to cheat or debug Ren'Py games. See full Features list below for details.
Some features in short:
Find, change, freeze and monitor variables, detect hidden choices, detect paths, rename any character, find/save/replay scenes, watch variables, skip splashscreen, textbox customizing
After developing Ren'Py mods for almost a year now, they thought is was time to create the mod of all mods.
So here is what we call URM (or Universal Ren'Py Mod). The goal of this mod is to enable anyone (even without any programming knowledge) to be able to...
I think it's been updated more recently than the thread, but it should work regardless.
Some Ren'Py games make it difficult or impossible to use it well. This isn't one of those.