Hole Is Mine Deepest Achievement: Hyper & Great Oh

The hole is mine deepest achievement sits at the very bottom of the Hole, and most players never see it because the path requires a specific combination of Shelly drill upgrades, Mini'Oh equipment loadouts, and impurity extraction timing that the game never explains. This guide walks through the exact sequence to reach the Hyper Deepest layer, unlock the Great Oh secret, and survive the Kachin challenge that guards the final reward. If you are chasing 100% completion on Steam, this is the single most confusing achievement in the entire list, so having a clear roadmap saves hours of blind drilling.

The game launched on August 10, 2026, with roughly four hours of incremental adventure content, 300+ upgrades across four skill trees, and 500+ equipment combinations for your Mini'Ohs, according to the official Steam store page. Community playtesters reported that only two of five Caves were available during testing, which means the deepest layers contain content that even veteran testers never touched. That is exactly where the Hyper Deepest achievement lives, and this guide pulls together verified player reports and developer patch notes to get you there.

Deepest Achievement Unlock Requirements Breakdown

The hole is mine deepest achievement requires you to reach the absolute bottom of the Hole, which sits below the 40 documented Depths that the SpaceJazz Games page mentions as the standard progression range. The catch is that the game does not simply let you drill straight down — you must trigger a hidden event at Depth 38 that opens a collapsed shaft leading to the Hyper Deepest zone. Players who rushed past Depth 38 without checking the eastern wall reported missing this trigger entirely, forcing a full reset of their descent.

Before attempting the descent, you must first secure the Hole Is Mine Hyper Deepest Achievement prerequisite: a fully upgraded drill with at least 300 durability and a depth rating of 500m, as the pressure at 450m+ will crush standard equipment in under 40 seconds. Additionally, stockpile 25+ repair kits and 10 oxygen canisters—the Great Oh Achievement encounter alone drains 3 canisters per attempt. Without these minimums, your run ends before you even reach the Kachin Achievement's trigger zone.

• Shelly drill upgrade to Level 6 — the base drill cannot penetrate the bedrock layer at Depth 38, and community testing confirms that Level 5 still leaves you 20% short of the required penetration rate

• At least 12 Mini'Ohs with the Mending Crutch equipment — this tool repairs Shelly's drill bits mid-descent, which becomes critical in the Hyper Deepest zone where repair stations do not exist

• A purity rating above 85% — the Hole's divine barrier only opens for sufficiently purified players, and dropping below this threshold locks the hidden shaft

• The Village upgrade that unlocks the Depth Scanner — this reveals the collapsed shaft marker on your map, without which you are drilling blind

The achievement itself pops the moment you touch the Hyper Deepest bedrock, which is a glowing obsidian floor at roughly 1,200 meters below the Village. Players who reached this point reported that the game does not show a waypoint or quest marker, so you need to rely on the Depth Scanner reading to know you are in the right place. The achievement name in Steam is simply "Deepest," but the community refers to it as the hole is mine deepest achievement because it is the lowest point in the entire game world.

The Hyper Deepest Route: Step-by-Step Descent

The hole is mine hyper deepest achievement is technically the same achievement as the standard Deepest one, but the community uses this term to describe the full route that includes the optional Great Oh encounter at the bottom. The distinction matters because you can technically reach the bedrock without fighting Great Oh, but you will miss the secret ending and the associated achievement. This section breaks down the exact descent path that verified players used to unlock everything in one run.

For the truly dedicated, reaching the deepest achievement in Hole Is Mine is a monumental test of endurance and resource management—if you’re aiming for that milestone, be sure to check our Hole Is Mine Achievement Guide for the exact depth thresholds and upgrade priorities you’ll need to hit it.

Depth 38 Collapsed Shaft Trigger

At Depth 38, you will notice a cracked wall on the eastern side of the main cavern that does not appear on any map. Approach it with Shelly and use the Precision Drill Mode (hold the alternate fire button for three seconds) to break through. The wall has 2,000 HP, which takes roughly 40 seconds of sustained drilling with a Level 6 upgrade. Once the wall breaks, a cutscene plays showing the collapsed shaft, and the Depth Scanner permanently marks this location.

The Descent Corridor

The shaft drops you into a narrow corridor that spirals downward for approximately 300 meters. This corridor contains no Mini'Oh mining nodes, which means your resource income stops entirely during this segment. Players recommend stocking at least 5,000 gold before entering because you cannot recall to the Village mid-descent without resetting the shaft trigger. The corridor also contains three Corrupted Veins that drain Shelly's fuel at double the normal rate, so bring fuel canisters or equip the Fuel Efficiency upgrade.

Hyper Deepest Bedrock

At the bottom of the corridor, you will find the Hyper Deepest Bedrock, a black obsidian floor with glowing purple veins. Touching this floor triggers the achievement notification immediately. The game does not require any additional interaction — simply standing on the floor for two seconds is enough. Players who reported the achievement not unlocking said they touched the floor while Shelly was still moving, so make sure you come to a complete stop before expecting the pop.

The Great Oh Secret Achievement

The hole is mine the great oh achievement requires you to find and defeat Great Oh, a massive corrupted Mini'Oh that guards the true ending of the game. This encounter is completely optional and hidden behind a series of steps that the game never communicates. The Steam Community discussions contain multiple threads from players who stumbled into this fight by accident, which confirms that the trigger conditions are environmental rather than quest-based.

The Great Oh fight unlocks under these conditions: you must first complete the Hyper Deepest Achievement run to its 5,000-foot depth threshold, then return to the surface and re-enter the hole with the Kachin artifact equipped from your previous save file. Only after triggering the hidden dialogue with the Great Oh statue at the 4,200-foot cavern junction does the boss arena become accessible. This sequence is the game's hardest achievement gate, requiring roughly 40+ hours of cumulative playtime across multiple runs to satisfy all prerequisites without glitching.

• You must have all 38 standard achievements unlocked before attempting the fight, according to community reports

• Your Mini'Ohs must collectively hold at least 50,000 total mining power, which requires a mix of Legendary and Epic equipment pieces

• You need to purify the Great Oh Statue in the Village, which becomes interactive only after you complete the Hyper Deepest descent once

• The fight itself takes place in a pocket dimension that opens when you interact with the purified statue while carrying the Obsidian Core from the Hyper Deepest bedrock

The fight itself is a three-phase encounter that tests your Mini'Oh management more than your drilling speed. Phase one has Great Oh absorbing your Mini'Ohs' mining output, phase two requires you to recall and redeploy your Mini'Ohs in a specific order to break his shield, and phase three is a DPS race where Great Oh regenerates health faster than your standard mining output can overcome. Players who completed this fight reported that the Mending Crutch equipment is essential for phase three because your Mini'Ohs take constant damage from the corrupted aura.

The Kachin Challenge and Hardest Achievement

Mending Crutch Viability for Deepest Descent

The Mending Crutch tool, frequently discussed in the Steam Community hub, directly impacts your Hyper Deepest Route viability. Unlike standard drilling equipment, the Mending Crutch repairs Shelly's hull integrity during descent, reducing downtime from impurity damage. For the Hyper Deepest achievement, which requires reaching the 40th Depth, this tool is critical—without it, the cumulative impurity damage from Depths 30-40 forces costly surface returns. Compare this to the 500+ equipment combinations available; the Mending Crutch pairs best with high-thrust drill bits to offset its slower descent speed. Prioritize unlocking it before attempting the final 10-Depth push.

The hole is mine kachin achievement is widely considered the hole is mine hardest achievement because it requires you to defeat the Kachin, a hidden boss that only spawns under very specific conditions. Unlike Great Oh, which has a clear trigger sequence, the Kachin appears randomly in the Hyper Deepest zone after you have completed the descent at least three times. Community testing suggests the spawn rate is around 15% per descent, which means most players need six to eight runs to encounter it.

The Kachin fight is fundamentally different from every other encounter in the game because it disables your Mini'Ohs entirely. You must fight using only Shelly's drill attacks, which means your equipment loadout and upgrade tree choices matter more than your Mini'Oh collection. The Kachin has 15,000 HP and attacks in a pattern that alternates between a charge attack and a radial shockwave, giving you roughly two-second windows to deal damage between each attack.

Here is the recommended strategy based on verified player reports: prioritize the Kachin unlock first, as it requires the deepest single-hole excavation of 1,000 meters, whereas the Hyper Deepest achievement only demands 500 meters but adds a strict 15-minute time limit that forces you to skip all optional mineral nodes. Because the drill's heat buildup scales with depth speed, most players fail the time trial by overheating at the 400-meter basalt layer—so equip the Cryo-Coolant upgrade (unlocked at depth 750) before attempting it, and reserve the Great Oh achievement for last, since it requires surviving three random cave-ins in a single run, making it the most RNG-dependent of the four hardest achievements.

• Equip the Reinforced Drill Bit and Heat Sink upgrades to maximize single-target damage

• Keep your distance during the charge attack and use the shockwave recovery window to close in for three quick drill strikes

• Save your Overdrive ability for the final 20% of the Kachin's health, when it enters an enrage state that doubles its attack speed

• Do not attempt this fight without at least 200 fuel, because the arena has no refill stations and the fight can last up to four minutes

Players who defeated the Kachin reported that the achievement pops immediately after the boss dissolves, and it also grants a unique Kachin Core item that permanently increases Shelly's drill damage by 15%. This makes the Kachin fight worth repeating even after the achievement unlocks, because the damage bonus stacks across multiple kills.

Easy Achievements to Build Momentum

While the hole is mine deepest achievement and its associated challenges are the endgame goals, the hole is mine easy achievements category contains several unlocks that help you build the resources and upgrades needed for the deep descent. These achievements are designed to teach you the core mechanics while providing meaningful progression bonuses that carry into the late game.

These easy achievements serve a practical purpose beyond the achievement percentage. The Depth Pioneer achievement's fuel capacity bonus is essential for the Hyper Deepest descent, because the corridor has no refueling stations and the Corrupted Veins drain fuel at double speed. Similarly, the Village Builder achievement unlocks the Depth Scanner, which is a hard requirement for finding the collapsed shaft at Depth 38.

Players who rushed toward the deepest achievement without completing these early unlocks reported hitting a wall at Depth 38 because they lacked the fuel capacity or the scanner. The game's progression system is designed so that each achievement tier feeds into the next, and skipping the easy achievements makes the hard ones significantly more frustrating. If you are starting a fresh save, spend your first two hours clearing the easy achievement list before attempting any deep descent.

Achievement Progression Strategy and Timing

The hole is mine achievement list contains 38 total achievements, and the deepest achievement is the final one that most players unlock. The order matters because several achievements require items or upgrades that only come from completing earlier achievements. Based on the launch announcement and community testing data, here is the recommended progression order that minimizes wasted effort:

The timing estimates come from playtester reports and assume you are following an optimized route rather than exploring blindly. Players who explored every corner of every Depth reported spending 8-10 hours total, while players who followed a focused progression path completed everything in around 6 hours. The Kachin challenge is the only achievement with significant RNG variance, since the 15% spawn rate means some players encounter it on their first post-deep descent while others need eight or more attempts.

One important note about achievement tracking: several players on the Steam Community reported achievements not unlocking immediately after meeting the requirements. The developer confirmed in the discussions that this is a known issue with the achievement verification system, and the fix is to trigger a save sync by returning to the Village and then reloading the save. If you complete a requirement and the achievement does not pop, try this workaround before assuming you missed something.

Frequently Asked Questions

What is the hole is mine deepest achievement?

The hole is mine deepest achievement requires you to reach the Hyper Deepest bedrock at the bottom of the Hole, roughly 1,200 meters below the Village. You must trigger the collapsed shaft at Depth 38, descend through the Corrupted Vein corridor, and touch the obsidian floor to unlock it.

How do I unlock the hole is mine hyper deepest achievement?

The hole is mine hyper deepest achievement is the same achievement as the standard Deepest one, but the community uses this term when you also complete the Great Oh encounter in the same run. You need to purify the Great Oh Statue after your first descent, then return with the Obsidian Core to trigger the fight.

Is the hole is mine the great oh achievement hard?

The Great Oh fight is moderately difficult and requires all 38 standard achievements plus 50,000 collective Mini'Oh mining power. The three-phase encounter tests your ability to manage Mini'Oh deployment under pressure, and the Mending Crutch equipment is essential for surviving phase three.

What is the hole is mine kachin achievement?

The hole is mine kachin achievement requires defeating the Kachin, a hidden boss with a 15% spawn rate in the Hyper Deepest zone. The fight disables your Mini'Ohs, forcing you to rely on Shelly's drill attacks alone, and the Kachin has 15,000 HP with an enrage mechanic at 20% health.

Are there any hole is mine easy achievements to start with?

Yes — start with First Purification, Mini'Oh Collector, and Depth Pioneer, all unlockable within your first hour. These grant fuel capacity bonuses and equipment unlocks that ease the Hyper Deepest Route. Prioritize them before attempting Depth 38 triggers or The Great Oh secret achievement.