Antewise

SteamWorld Dig Zones: One Line You Cannot Cross Back

Updated 31 Oct 2026 Source The three-zone structure with Archaea as the starting area holding the generator room, Trilobite lasers and the drill cave, the Old World introducing the steam punch, fall dampeners and bouncy mushrooms, and Vectron introducing the metal detector in its first named cave, Uranium and Dark Matter, and a 871-metre bottom of the world, from the Steam Community 100% achievement guide and the steamXO and PSNine trophy guides; the completion thresholds of 20,000 gold collected in total and 150 blue orbs collected in total, the 8 Uranium ore and 16 Dark Matter ore sale achievements, the warning that entering Vectron makes the Fully Loaded max-all-upgrades achievement unobtainable, the destroy-two-generators-before-Vectron achievement, the secret area locations in each zone including the four Dark Matter in the Archaea generator room and the secret blocks in Vectron being silver on top and black underneath with two thick wires, and the 2 hour 22 minute documented full-collection run, from the same trophy guides; the note that the game is divided into three bounded regions with hidden items usually placed near the boundaries, that upgrades replace a crafting system, and that caves are self-contained challenge rooms rewarding cogs and hidden items with some granting new equipment such as the gun and the jetpack, from the Baidu Baike critique of the game. Verified 31 October 2026. By Antewise Editorial
Data status: The facts on this page were checked against the source named above. Game values can still shift with a patch, so re-check anything that looks off.

SteamWorld Dig looks like an open descent. It is actually three bounded regions stacked on top of each other, and the boundary between the second and third is a one-way door in the most literal sense.

Understanding the zones as zones — rather than as “deeper” — is what stops you losing an achievement you cannot get back.

Zone one: Archaea

The starting area, and the one players rush. It is also the one holding things you will want later.

What is here:

  • The generator room — with a secret containing 4 Dark Matter beside the boxes, and a second secret to the far left up by the two Trilobites and the laser.
  • The drill cave, the last cave in the zone, with a secret visible above you.
  • The first generator, one of the two you can destroy for the Order Breaker achievement — and the achievement specifically requires two generators destroyed before you enter Vectron, so this is a zone one and zone two job.

The zone’s upgrade is the drill. Its purpose in the run is to get you the money and the tools for everything after it.

Zone two: the Old World

Two unlocks change the game here:

The steam punch. This is the most important upgrade in SteamWorld Dig, and not for combat. Three fully charged punches destroy a boss generator, which means the steam punch is a direct reduction of the final fight’s length. Trophy guides put drill and steam punch as the top two priorities for exactly this reason.

The fall dampeners, which stop gravity being the main cause of death.

The Old World also introduces bouncy mushrooms, which are traversal and also a puzzle tool — there is a secret that requires throwing dynamite onto a mushroom so it bounces and destroys a single tile.

Its secrets are the fiddliest set in the game: one behind the top-right blocks in the mushroom cave, one where a shiner is sleeping on three boxes, one with a lever directly to the left of the third named cave, one reached by steam-punching a wall near the upgrade machine, and one in the generator room behind a box stack.

Zone three: Vectron

Everything here is a gate.

The metal detector, in the first named cave, is the zone’s real unlock — after that you can see every ore node on the map, which converts the zone from exploration into collection.

Uranium starts appearing well down into Vectron, and there is an achievement for selling 8 at once.

Dark Matter concentrates near the bottom, and there is an achievement for selling 16 at once (four stacks).

The 871-metre bottom of the world is in this zone, and the efficient route is to dig straight down before the boss cave, not after.

The hidden blocks here do not look destructible. They are silver on the top, black on the bottom, with two thick wires connecting them. That visual signature is repeated several times in the zone, including in the final boss map where it is the most commonly missed secret in the game.

The line you cannot cross back over

Entering Vectron makes the “Fully Loaded” achievement — maximise all upgrades — permanently unobtainable on that save.

This is the single most expensive piece of zone knowledge in the game, and the game does not warn you.

The order that avoids it:

  1. Get the steam punch in the Old World.
  2. Go back up. Sell everything.
  3. Buy every remaining upgrade tier.
  4. Then descend into Vectron.

If you are already past it, the only fix is a new save — and a documented full run takes about 2 hours 22 minutes with every ore node and cave cleared, so the replay is not catastrophic, just annoying.

What the two cumulative targets need

Two achievements are run-wide rather than zone-specific:

  • More than 20,000 gold collected in total.
  • More than 150 blue orbs collected in total.

Both are reachable by clearing the zones properly rather than grinding: the trophy route mines out the Old World’s orbs, clears Vectron’s ore with the metal detector, and finishes with over 200 orbs without farming. Gems come from hidden areas and the purple dots the detector reveals, so the completionist route and the economy route are the same route.

How to actually work a zone

  1. Mine the boundary, not the middle. Hidden items cluster near the edges of each bounded region, so the perimeter is where the value is and the centre is where the dirt is.
  2. Clear caves before moving down. Caves are self-contained challenge rooms and some of them hand you actual equipment — the gun and the jetpack among them — which means skipping a cave can mean skipping a tool.
  3. Bank a teleport item stack before each zone. The warp device unlocks at level 8, and the round trip to town is the main time sink in a run.
  4. Destroy the two generators early. It is a zone one and two job and it becomes impossible in zone three.
  5. Do the 871-metre descent and the ore-stacking achievements before the boss door. The ascent is the expensive part.

Frequently asked questions

How many zones are in SteamWorld Dig?

Three: Archaea, the Old World and Vectron, in that order going down. Each has its own upgrade unlock and its own boss-adjacent content.

What is the point of no return in SteamWorld Dig?

Entering Vectron. Once you descend into it, the Fully Loaded achievement for maximising every upgrade becomes unobtainable on that save. Max your drill, steam punch and everything else before you go.

What unlocks in the Old World in SteamWorld Dig?

The steam punch, which is the single most important upgrade in the game because it is what breaks the boss's generators, and the fall dampeners, plus the bouncy mushroom traversal.

What is in Vectron?

Uranium, Dark Matter, the metal detector in the first named cave, the hidden silver-and-black wired blocks, and the 871-metre bottom of the world. It is also where the final boss waits.

How deep is the bottom of SteamWorld Dig?

871 metres. There is an achievement for reaching it, and the cheapest route is to dig straight down just before the boss cave rather than after.

How much gold and how many orbs do I need in SteamWorld Dig?

Two achievements want more than 20,000 gold collected in total and more than 150 blue orbs collected in total. Both are cumulative across the whole run, and a documented completion run finished with over 200 orbs.

More SteamWorld guides

Sources

Figures and item data on this site are read from the game’s own reference wiki before publishing. Where a value could not be confirmed there, the page says so instead of filling the gap.