Alchemia Story was developed by Asobimo, and takes place in a world where alchemy is everywhere, literally.
In Alchemia Story, you create your own character, fight against enemies in turn based combat, and perform special team attacks, just to name of few of its highly engagin mechanics.
What makes Alchemia Story unique is that you can join another players' battles via a real-time assisting system. Players can see one another battling an enemy while on the overworld map and jump in to help at any time. It's truly multiplayer in almost every sense.