The world map is a ten-step vertical ladder — basic stone through Starcore to the Lava core — documented by official badges, plus the unlock, rebirth, and milestone systems around it.
The map is a single descent. Ten official Reach badges name the route — basic stone (Layer 1) down through cobblestone, andesite, tuff, basalt, and Deepslate, past Voidstone and Starcore, ending at the Lava core. Around that world run four systems: the explosive unlock ladder (27 named TNTs), the rare-ore collecting loop, a badge/milestone layer that doubles as the game's de facto changelog, and a rebirth system the title started advertising between October 1 and October 3, 2026. Servers hold up to 16 players, and the game sits in Roblox's Simulation — Incremental Simulator genre.
Layer names, badge text, and how many players had reached each layer at the checked date. Source: official Roblox badge layer, checked 2026-10-03.
| Milestone | Layer name (official) | Official badge text | Players awarded |
|---|---|---|---|
| Layer 1 | Basic stone | "Just basic stone!" | 738,536 |
| Layer 2 | Cobblestone | "Just some cobblestone!" | 277,505 |
| Layer 3 | Andesite | "Just some andesite!" | 95,917 |
| Layer 4 | Tuff | "Just some tuff, this is pretty tough!" | 57,260 |
| Layer 5 | Basalt | "Getting down to basalt!" | 42,445 |
| Layer 6 | Deepslate | "Now we are at Deepslate!" | 35,715 |
| Layer 7 | (unnamed in the badge) | "Reach the very last layer!" | 31,410 |
| Layer 8 | Voidstone | "Into the Voidstone!" | 28,109 |
| Layer 9 | Starcore | "Starcore, the very last layer!" | 24,872 |
| The core | Lava | "Now you are at the Earth's core!" | 35,576 |
Two facts worth reading off the table. First, the drop-off is steep: 738,536 players hold Layer 1, but 24,872 had reached Starcore and 35,576 the Lava core at the checked date — most sessions happen in the top four layers. Second, the map grows: Layer 7's badge was created on September 3, 2026 calling it "the very last layer"; the October 1, 2026 update added Layers 8 and 9 and moved the "very last layer" label to Starcore. The Reach Lava badge marks the Earth's core itself.
The loop the official description promises, in order.
Progress comes from setting off your current TNT to clear terrain downward. Each blast has an observed clearance — how much depth it removed — which is the number your own notes should track. Nothing about clearance per blast is published; the game wants you to feel each new TNT's difference yourself.
The unlock ladder runs 27 names long, from Dirt TNT ("your very first TNT") to Singularity TNT ("this one swallows the world!"). Requirements and prices are not published — the in-game unlock screen is the deciding reference — but the official award counters show the ladder's pacing: over half a million players hold Dirt TNT, 334 had Blackhole TNT.
The description's second promise is "dig deeper and deeper to find rare ores". Ores are the collecting and (by the badge evidence) milestone layer of the economy. Names, rarity, and values are not published; the ores reference covers how to record your own yields.
The [Rebirths!] title suffix, live by October 3, 2026, confirms the reset system exists. What it resets, what it costs, and what multiplier it grants are all unpublished. The safe sequence: read the in-game rebirth screen in full, and compare any shared claim about rebirth multipliers against that screen before believing it.
This creator ships no patch notes; the badge layer is where updates are announced.
Both of the game's documented content drops arrived as badges: the September 3, 2026 layer added the first 30 badges (the welcome badge, 21 TNT unlock badges, and Reach Layers 1–7 plus Lava), and the October 1, 2026 update added eight more (six TNTs plus Layers 8 and 9). When you want to know whether the game changed, the badges page on the official Roblox listing answers faster than any wiki — the full dated timeline is on the updates page.
Turn the layer names into run planning.
Nine numbered layers plus the core, all named by official badges: basic stone, cobblestone, andesite, tuff, basalt, Deepslate, an unnamed Layer 7, Voidstone, and Starcore, with the Reach Lava badge marking the Earth's core itself. Layers 8 and 9 were added by the October 1, 2026 update.
The Earth's core. The official Reach Lava badge says "Now you are at the Earth's core!" — so the journey ends at lava, below Layer 9's Starcore. 35,576 players held that badge at the October 3, 2026 check.
Yes. The live Roblox title read "TNT to Earth's Core! [Rebirths!]" on October 3, 2026; the title had no such suffix in the August 25 snapshot. No rebirth cost, reset scope, or multiplier has been published, so the in-game rebirth screen is the deciding reference.
The badges name the layers but not their depths. Your own depth number, shown in-game, is what the calculator takes as input — no official meter-per-layer table exists.
Open the adjacent page that answers your next question.
