《希歐多爾》是一款必須在匿蹤與利用「類相機功能」控制敵人的之間來回切換的橫向卷軸平台解謎遊戲，
講述在一個暗地研究鍊金術與寶石的王國實驗室中，發生了意料之外的實驗爆炸，
一個尋找弟弟的姐姐看見了弟弟因為爆炸而心臟化為碎片碎落一地的一幕，
從而下定決心往深處探索，找出拯救弟弟的方法與事件的真相。
《Theodore》is a Side-Scrolling Platform Puzzle Game that player need to hide and use the Camera-similar Function to control the enemy .
Story :
The Kingdom excavated an alchemy book and a machine from the ruins , and used them to study the art of resurrection and gem crystallization .
kindom's people study Resurrect and magic crystals because of a prophecy mirror that said '' When Resurrect success , kindom will get an eternal life . '' .
In the slum, there was a pair of older brothers and sisters . the younger brother has unstable emotion and even want to commit suicide , beacause he is introverted and long stay at home . After that , he is controlled by magic crystals that kindom give everyone , and went to Kingdom's Church alone at night .
When elder sister noticed younger brother is gone , she find out brother's diary and decided to dive in the church to find him.
However , after diving in , she found that his younger brother had carried out a transformation experiment , which failed and exploded . His heart also became fragments and scattered all over the ground .
The elder sister again decided to dive deeper to find a way to save her younger brother .