This RPG takes place inside an enormous, mysterious Tower that randomly teleports people from Earth into its deadly floors. Players wake up in a decaying urban tutorial zone filled with zombies and must survive to unlock their first class — assigned by the Tower based on their actions. After completing the tutorial, they enter the Yggdrasil Hub, a massive city-world that serves as the central base for climbing the Tower’s 100 floors.
Players gain XP and Essence Shards by defeating monsters, which can be exchanged for items or used to increase attributes. Skills are unlocked randomly at the start and later acquired through challenges, loot, and hidden events. The system features detailed stats, evolving abilities, and a living world full of NPCs, dangers, mysteries, and player freedom.

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