Spritual successor to the old pokemon games.
You need to buy/download the DragonRuby Game Toolkit. Once you do download the zip and extract. Replace the "mygame" directory contents with the contents of this repository.
Next you need to purchase some of the non-free assets used from here as well as the free version of this and place them into the sprites/non-free directory in this repo(name one of the directories "Modern_Interiors" and the other "RPG_Battlers").
Once that is done simply run the dragonruby executable from the DragonRuby Game Toolkit.