Depth Incremental Upgrade Guide: Costs and Caps

Depth Incremental puts its upgrades in separate rooms stacked down one long staircase. Each room uses its own currency and has its own caps, so progress comes from moving between them. Cash Upgrades sit at Depth 20m, Dirt Fossils at 30m and the Worm Burrow at 50m. The Upgrade Tree is behind a paid door at 70m, and Titles is behind another one at 90m. The Boss door is further down.

Quick answer: Cycle the 20m, 30m and 50m boards until you have 2.20M Cash. Open the Upgrade Tree at Step 70, then save 43M Cash for the Titles door at Step 90.

Depth Incremental upgrade rooms by depth

Every room has a header over its entrance and a depth readout on screen. Use the depth readout to find your place on the staircase. The three upper rooms are open as you pass them. The two deeper rooms each have a door signboard that lists a step requirement and a Cash price.

Every board has a Buy button and a Max button. Buy purchases a single level. Max spends as much as you can afford on that upgrade in one press. Each line shows the current value, the value after the next level, and the price, so a line like “x24 > x25 / 110K Cash” tells you exactly what you’re paying for.

Upgrade route from Cash Upgrades to the Titles room

No single board takes you all the way. Each one gets more expensive as you level it, and the cheapest next purchase moves from room to room. The route below runs one full loop, then repeats until the deeper doors open.

Climbing back up from 70m takes you past 60m and 52m before you reach the Worm Burrow. Other players use the same staircase, so expect to share it.

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Cash Upgrades board costs (Depth 20m)

The Cash Upgrades board has three lines. Walk Speed caps out early, at level 5/5 with a speed of 21. Faster Cash shortens the time between Cash payouts and maxes at level 16/16. More Cash raises your Cash multiplier and goes up to level 99, which makes it the board’s long-term upgrade.

Faster Cash roughly doubles in price with each of its last four levels. When the line reads 0.2s / MAXED, it’s done. More Cash grows in price far more slowly, so after Faster Cash is maxed, More Cash is where spare Cash goes on every visit to this board.

Dirt Fossils digging and Fossil Upgrades (Depth 30m)

Digging is automatic once you stand on the glowing yellow patch. The game equips a red shovel and digs on a timer. Each dig costs 250 Cash. Every fossil you find adds a permanent bonus to your account’s Cash and luck multipliers. The room’s list counts your total digs (“171 Dug” and climbing past “1.14K Dug”) and tracks how many of each fossil you have against that fossil’s limit.

The four common fossils fill up quickly. Most of your fossil progress in the Dirt layer comes from Fish Bone and Ammonite, and the rarer fossils further down the list depend on luck. That’s what the Fossil Upgrades board is for.

More Fossils sets how many fossils each dig pulls up. It caps at level 9/9 and shows “+10 / MAXED.” Faster Digs caps at level 10/10 with a 0.5s dig. Fossil Luck has 20 levels and costs the least per level of the three, so it makes sense to buy a level on every visit. Fossil Luck at 14/20 (x2.5) is enough to keep moving through the Dirt layer.

The 30m passage is a short walk from both stairways, so a quick dig-and-buy stop on the way between 20m and 50m takes very little time.

Worm Burrow upgrades and golden worms (Depth 50m)

Worms spawn on their own inside the pink-bordered area of the Worm Burrow until they hit a cap. You walk over them to collect them. The cap starts at 14, and the Max Worms I tree pad raises it to 17. The Worm Burrow board shows the current count (for example “Worms: 14/17”) and how much each worm is worth.

Some worms spawn golden. A golden worm is worth x10 a normal one. The base golden chance is 12%, and the Golden Worms tree pad raises it to 15%. The value per worm on the board rises as you level Worm Value, from +5 per worm early on to +20 per worm after the tree’s x2 Worm Value pad.

Worms are spent on the Worm Upgrades board next to the spawn area. All three upgrades are paid in worms, not Cash.

Faster Worms is the only worm upgrade with a short cap. It maxes at level 12/12, where worms spawn every 0.3s, and the final level costs 1.80K worms. Worm Value and Cash Boost both run to 30 levels. Worm Value increases how many worms each pickup gives you, and Cash Boost turns your worms into extra Cash income.

The burrow’s doorway opens directly onto the main staircase. Coming back to collect worms is a short detour whether you’re coming down from 30m or climbing up from the tree.

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Upgrade Tree pads and costs (Depth 70m)

The Upgrade Tree is a room full of green pads connected by lines of light. To buy a node, step onto its pad. When the pad turns to “Owned,” the bonus is permanent. Unlike the upper boards, these nodes boost several systems at once: Cash, worms, fossils and pickup range.

The two More Cash pads and the two worm pads can all be bought on your first visit after the 2.20M door. Pickup Range and More Fossils I come next. Golden Worms is the most expensive pad that doesn’t need a rebirth, at 25.0M Cash. That’s more than half the cost of the Titles door, so decide in advance whether to buy it before or after opening Titles.

Title rolls and Title Upgrades (Depth 90m)

Stand on the purple “Roll for a title” pad to open the ROLL A TITLE panel. Each roll costs 1.00M Cash. The panel also has an Auto toggle, which starts set to Off, and shows your current Title Luck multiplier. Each roll gives you a random title, and duplicates go into your inventory.

The Title Upgrades board, also in the room, has two Cash upgrades. Title Luck improves your chances of rolling higher-tier titles and has 20 levels. Roll Speed shortens the wait between rolls and has 8 levels.

Both lines get expensive fast. Roll Speed’s third level costs 32.0M Cash, which is about 32 rolls’ worth. The first two Title Luck levels are cheap compared with that, and you can confirm each purchase by watching the Title Luck multiplier rise on the roll panel. Once your title collection is under way, the stairs below the room lead on to the BOSS doorway.