Subterra Roblox Guide (2026) — Mining, Ranks & Codes
Subterra hands you a pickaxe and one job: dig deeper. This 2.5D procedurally generated mining game by Polyworks Studio sends you down through ten ore tiers and progressively hostile layers, upgrading your gear, drawing Ability Cards, crafting weapons, and fighting the monsters that live in the dark. This 2026 guide breaks down the two currencies, the full ore order, the Ability Card and rank systems, every game pass, all the active codes, and how to earn free Robux for the extras.
In This Guide
What Is Subterra on Roblox in 2026?
Subterra is a 2.5D procedurally generated mining game by Polyworks Studio, a verified-badge group on Roblox. You start at the surface with a basic pickaxe and dig downward through layers that get more hostile the deeper you go. The mine is generated fresh, so the tunnels, ore pockets, and chests are never laid out the same way twice. The loop is mine ores, upgrade your pickaxe and backpack, descend, craft weapons, fight monsters and bosses, and hunt down recipes and chests.
The numbers back up the appeal. As of June 2026 Subterra has pulled in roughly 10.4 million visits, 268,000 favorites, and a rating around 94 percent from over 54,000 votes. Concurrent players sit near 572 with a 24-hour peak around 1,093, and servers hold up to 10 players each. The game was created on March 21, 2024, opened to public testing in February 2025, and was last updated on June 23, 2026, so it is actively maintained.
If you came up through Roblox mining grinders like Mining Simulator 2 or the digging-and-selling loop of Dig, Subterra will feel familiar but more roguelite. Instead of an idle pet grind, it asks you to manage a real descent: a periodic mine reset called The Collapse, combat against monsters and bosses, and a card-based build system that makes every rank-up run play a little differently.
Gold Coins and Chrono Shards: The Two Currencies
Subterra runs on two currencies that you should never confuse. Gold Coins are your bread-and-butter resource. You earn them by selling ore, and you spend them on pickaxe and backpack upgrades and shop items. A faster pickaxe and a bigger backpack are the two upgrades that decide how quickly you can push deeper, so most early Gold goes straight into those.
Chrono Shards are the second currency, and they feed your build rather than your gear. You spend Shards at the Chrono Crystal to draw or buy Ability Cards, the character upgrades that shape how you survive the deep layers. Because Ability Cards are the difference between a fragile miner and one who can fight through monster-packed tunnels, Shards are worth saving for the cards you actually want.
One thing that trips up new players: Gems, Shards, and Crystals come mainly from chests, not from digging ore. Swinging your pickaxe at ore veins fills your backpack with sellable material for Gold, but the rarer resources are locked inside chests scattered through the mine. That is why carrying ladders to reach those chests matters as much as the mining itself.
The 10 Ore Tiers by Depth
Ore in Subterra is layered by depth, and the order matters because deeper ores sell for far more. From shallow to deep, the ten tiers are Copper, Tin, Iron, Silver, Gold, Platinum, Cobalt, Chromium, Titanium, and Wolframite. Each new tier sits in a more hostile layer, so the descent is a steady trade: tougher monsters and more dangerous terrain in exchange for ore that is worth the risk.
Your early runs will live in the Copper, Tin, and Iron bands. These are safe and cheap to mine, and they fund your first pickaxe and backpack upgrades. Once your gear can keep pace, push into Silver, Gold, and Platinum, where the per-ore payout climbs sharply. The bottom three tiers, Cobalt through Wolframite, are where the real money is, but you have no business mining them until your build and weapons can handle the layer.
Treat the ore order as a checklist for progression. If you are still struggling in the Silver and Gold bands, that is a sign your pickaxe speed or backpack size is behind, not that you need to gamble on a deeper descent. Match your depth to your gear and the Gold flows steadily instead of in risky, occasional spikes.
The Core Loop and Controls
The moment-to-moment loop is tight. Hold left mouse button to mine, fill your backpack, head up to sell for Gold, upgrade your pickaxe and backpack, then descend again a little deeper. Layered on top of that are the Chrono Crystal for Ability Cards, weapon crafting for combat, and chest hunting for the rarer resources and recipes. The controls are simple: E opens your inventory, C interacts, F blocks or parries in combat, and LMB mines.
Two systems make the descent feel like a real expedition. The first is The Collapse, the periodic reset of the mine. When it triggers, the procedurally generated tunnels wipe and rebuild, so anything you have not banked or carried out can be lost. The second is the To Surface button sitting above your health bar, which fast-travels you back up. Hit it before a Collapse strands you deep with a full backpack you never got to sell.
Mobility tools round out the loop. The Mega Magnet auto-picks-up loot within 64 studs, which is 16 blocks, so you spend less time chasing dropped ore. And you should always carry 5 to 10 Wooden Ladders, because chests are often perched where you cannot reach them by digging alone. A few ladders turn an out-of-reach chest into free Gems and recipes.
Ability Cards and Slots
Ability Cards are how you build a character in Subterra. You draw or buy them from the Chrono Crystal with Chrono Shards, and each card layers a passive or active effect onto your miner. A run with the right cards can fight through monster-dense tunnels and survive bosses; a run without them stalls out fast in the deeper layers. Your card choices, not just your gear, decide how far you get.
The number of cards you can run at once scales with your level. You gain an extra ability slot every 2 levels, so a higher level directly means a stronger, more flexible build. That tie between leveling and slots is the engine behind the rank system, since every rank-up resets your level and sends you climbing back through those slot unlocks with whatever cards you have collected.
If you want to commit harder to the build side, two game passes add permanent card slots on top of the level-based ones. Extra Card Slot costs 299 Robux for the first and 699 for the second, capped at two, while Extra Forge Slot is 199 Robux each with no limit for crafting more at once. Neither is required, but they suit players who lean into a card-heavy or crafting-heavy playstyle.
Ranking Up: The Prestige System
Ranking up is Subterra's prestige loop. When you rank up, your level resets to 1, but your level cap rises by 5 per rank. So each rank trades the levels you have banked for a higher ceiling, and over time that ceiling lets you run far more ability slots than a non-ranked character ever could. The maximum rank is 11, which is the long-term goal for committed players.
The decision of when to rank up is the strategic heart of the game. Rank too early and you give up a strong build for a temporary downgrade; rank too late and you are sitting at a cap you have already maxed, gaining nothing. The sweet spot is ranking once you have hit your current cap and have enough Ability Cards and gear to climb back quickly. Each climb back is faster than the last as your account-level upgrades stack up.
Think of ranks as the reason to keep playing past your first deep descent. Hitting Wolframite once is satisfying, but the rank ladder is what gives Subterra its long tail, pushing you to refine your card build and gear so each prestige run goes smoother and deeper than the one before.
Game Passes and Bundles
Subterra is free to play, but it sells a set of convenience game passes for Robux. None of them gate progression; they smooth out the grind. The headline passes are Bottomless Backpack at 1,399 Robux for unlimited carry capacity, Sell Anywhere at 550 so you skip the surface trip to sell, and Mega Magnet at 199 for the 64-stud auto-pickup. Cheaper utility passes include Pickaxe Transmogrification at 98, Skip Card Animation at 49, and the Snowglobe Lantern cosmetic at 399.
A couple of passes are aimed at serious grinders. Ore Server Boost at 200 Robux doubles ore drops server-wide for one hour, which is generous in a full 10-player server since everyone benefits. The card and forge slot passes covered above round out the build-focused options. There is no requirement to buy any of these to reach max rank.
For bundles, the Spelunker's Pack runs 299 Robux, and the starter pack at 99 Robux hands you 1,500 Gold, 200 Chrono Shards, and a Tier 10 Pickaxe. That starter Tier 10 Pickaxe is a real head start, since it lets you mine through the early bands quickly and reach the profitable middle tiers sooner than a fresh account.
Tips for Digging Deeper in Subterra
Upgrade backpack and pickaxe first. Carry capacity and mining speed are the two upgrades that unlock every other tier, so pour your early Gold into them before anything else.
Carry ladders everywhere. Keep 5 to 10 Wooden Ladders on you at all times, because the chests with Gems, Shards, and recipes are often unreachable by digging alone.
Bank before The Collapse. Use the To Surface button above your health bar to sell and reset safely; a full backpack is worthless if a Collapse wipes the mine while you are deep.
Spend Shards on a real build. Draw Ability Cards with a plan instead of randomly. A focused card build survives the deep layers where a scattered one falls apart.
Match depth to gear. If you are dying or mining slowly in a band, you are too deep for your gear. Back off a tier, upgrade, then push again.
Time your rank-ups. Rank up when you hit your cap and have cards ready to climb fast, working toward max rank 11. And ignore any "free Robux generator," which is always a scam.
Subterra Codes (July 2026)
Subterra has a real, active code system, and the rewards range from Chrono Shards and Gold to potions, TNT, and EXP boosts. You redeem at the Codes NPC in the lobby, near the gate opposite the Sell area. Talk to the NPC, paste the code exactly as shown, and press Claim Code. Codes here expire fast, so redeem any new one the day you see it.
| Code | Reward | Status |
|---|---|---|
| 100KMEMBERS | 420 Chrono Shards + 10 Wormhole Potions + 10 Return by Death Potions | Active |
| 1YEAR | 1,400 Chrono Shards | Active |
| FEATURED | 32 TNT blocks + 1hr 2x EXP | Active |
| 30KLIKES | 2hrs 2x EXP | Active |
| RELEASE | Chrono Shards + Gold | Active |
| UPDATE | 140 Chrono Shards | Active |
Codes get rotated out quickly as the developers ship updates and hit milestones, so a code that works today may be dead next week. For the running list as we verify new ones and mark old ones expired, check our Subterra codes page, which we keep current. The 1YEAR and 100KMEMBERS milestone codes alone hand out well over a thousand Chrono Shards, enough to draw a serious stack of Ability Cards without grinding chests for hours.
How to Earn Free Robux for Subterra
Subterra is free to play, but the convenience passes like Bottomless Backpack and Sell Anywhere, plus the Spelunker's Pack and starter bundle, all cost Robux, and mining ore does not pay those out. If you want the bigger backpack or a head-start bundle, you can earn Robux through Earnaldo and put it toward exactly that. It is the safe route: never touch a "free Robux generator" or hand over your password, because those are always scams.
Earn Free Robux While You Play
Want Robux for Subterra game passes and other Roblox games? Earnaldo lets you earn free Robux by completing simple tasks — no survey spam, no downloads, just real rewards.
Frequently Asked Questions
Subterra is a 2.5D procedurally generated mining game by Polyworks Studio where you dig deeper through progressively hostile layers, upgrade your pickaxe and backpack, craft weapons, and fight monsters and bosses. As of June 2026 it has around 10.4 million visits, 268,000 favorites, and roughly a 94 percent rating, with up to 10 players per server.
Subterra uses Gold Coins and Chrono Shards. Gold Coins upgrade your pickaxe and backpack and buy items from the shop, while Chrono Shards are spent at the Chrono Crystal to draw or buy Ability Cards. You get most Gems, Shards, and Crystals from chests rather than from digging ores directly.
From shallow to deep the ten tiers are Copper, Tin, Iron, Silver, Gold, Platinum, Cobalt, Chromium, Titanium, and Wolframite. Each tier sits in a more hostile layer, so deeper ores are worth more but the descent gets harder.
Ranking up is Subterra's prestige system. When you rank up, your level resets to 1 but your level cap rises by 5 per rank. The maximum rank is 11, so committing to ranks trades short-term level loss for a much higher ceiling and stronger long-term character.
Ability Cards are character upgrades you draw or buy from the Chrono Crystal using Chrono Shards. They define your build, and you unlock an extra ability slot every 2 levels, so more cards can be active as you level up. Game passes let you add up to two more permanent card slots.
As of June 2026 the working codes include 100KMEMBERS for 420 Chrono Shards plus 10 Wormhole Potions and 10 Return by Death Potions, 1YEAR for 1,400 Chrono Shards, FEATURED for 32 TNT blocks and 1 hour of 2x EXP, 30KLIKES for 2 hours of 2x EXP, RELEASE for Chrono Shards and Gold, and UPDATE for 140 Chrono Shards. Codes expire fast, so redeem them quickly.
Codes are redeemed at the Codes NPC in the lobby, near the gate opposite the Sell area. Talk to the NPC, paste the code exactly as written, and press Claim Code to receive your Chrono Shards, potions, or boosts. Codes are time-limited and expire quickly.
The Collapse is the periodic reset of the mine. The procedurally generated tunnels are wiped and rebuilt, so anything you have not banked or carried out can be lost. Use the To Surface button above your health bar to fast-travel up before a Collapse strands you deep with full pockets.
About This Guide
This guide was last updated on June 24, 2026 and reflects the current state of Subterra. For the full cluster, visit our Subterra hub or grab the latest working codes on our Subterra codes page. Weighing it against the genre leader? See our Subterra vs Mining Simulator 2 comparison, and if you like fishing-grind progression, our Fisch guide covers another popular loop. You can play Subterra directly on Roblox or check the Subterra wiki for deep mechanics. Spot something out of date? Let us know in the Earnaldo Discord.