通過不斷克服考驗，來打造自己的通關方式！

在險惡且充滿被新能源「納奇」所污染的破敗建築裡生存下去，並嘗試逃離建築物。
玩家會有一個類似於基地的安全屋，是玩家的初始位置。往下通過一層一層的樓層，期間收集物資來存活與回到基地來強化自身，挑戰每層的最終BOSS並得到去往下層的鑰匙。
在上述的基礎上加入地圖搭配的隨機性，讓玩家即使通關也會有想探索不同可能性的動力。
在劇情和遊戲的元素安排上，想傳達的是人類在面對困境時會做出的選擇，以及若是出現的跳脫於理解的能源危機，世界會怎麼樣呢？

Phaestus

Forge Your Own Path by Overcoming Challenges!

Survive in a perilous, decayed building polluted by the new energy source, "Nachi," and attempt to escape.

Players start in a safe house, which serves as their base. As they descend through each floor, they must gather resources to survive, return to the base to strengthen themselves, and challenge the final boss of each level to obtain the key to the next.

With randomly generated maps, every playthrough offers fresh possibilities, encouraging players to explore different strategies even after clearing the game.

The story and gameplay elements aim to explore the choices humanity makes in times of crisis and question what would happen if an incomprehensible energy catastrophe reshaped the world.