Million Depth follows Moma as she searches for her friend in an underground world said to stretch a million floors deep. The setting does not remain fixed: timelines reveal different versions of the truth, and Moma’s fate changes with the world around her. Clues gathered on the journey help her piece together its mysteries, while her past decisions can shape what happens later, including across timelines. That gives the descent a narrative structure tied to discovery and consequence rather than a single unchanging account.
Survival hinges on timing and preparation. Moma’s biotope jammer stops time around her while she remains still, giving her a chance to plan around dangerous creatures. Her weapons and shields wear down in battle and eventually break, so a pause can be essential when she is left defenseless. Equipment is built by combining blocks, with some improved by pairing them with others of the same type. The system supports different approaches, including long-range guns and sturdy shields, but making useful gear depends on the blocks available and how they are combined.
The journey also folds trading into its resource decisions: shopkeepers offer blocks, items, and relics, but bargains depend on the value of Moma’s offer and the shopkeeper’s mood. A fluctuating resource called Stockinum adds another variable. The listed format is single-player, so Million Depth’s player-count context is a solo adventure shaped by tactical encounters, crafting, barter, and a changing story, rather than a multiplayer mode.
