Tuxemon is a free, open source monster-fighting RPG. It's in constant development and improving all the time! Contributors of all skill levels are welcome to join.

Features:

• Game data is all json, easy to modify and extend
• Game maps are created using the Tiled Map Editor
• Simple game script to write the story
• Dialogs, interactions on map, npc scripting
• Localized in several languages
• Seamless keyboard, mouse, and gamepad input
• Animated maps
• Lots of documentation
• Python code can be modified without a compiler
• CLI interface for live game debugging
• Runs on Windows, Linux, OS X, and some support on Android
• 183 monsters with sprites
• 98 techniques to use in battle
• 221 NPC sprites
• 18 items