How to Get Tunneling Codex in Mina the Hollower

Quick Answer: How Do You Get Tunneling Codex?

To get Tunneling Codex in Mina the Hollower, find the Ring Dive Parlor near Sandfalls and speak with the Ring Master.

Pay 100 Bones to enter the Ring Diver mini-game and reach a score of 5,000 points. Once you hit the required score, you receive Tunneling Codex.

Tunneling Codex lets Mina hold Jump to burrow repeatedly without needing to land between burrows.

Where to Find the Ring Dive Parlor

The Ring Dive Parlor is reached through Bone Junction, west of Sandfalls.

Look for the route near the lowered rope, then enter the hole that leads into the Ring Dive Parlor.

Inside, speak with the Ring Master to begin the Ring Diver mini-game. Each attempt costs 100 Bones.

How to Get Tunneling Codex

Travel to the Sandfalls area and reach Bone Junction.
Head west through Bone Junction.
Find the lowered rope and enter the nearby hole leading to the Ring Dive Parlor.
Speak with the Ring Master.
Pay 100 Bones to start the Ring Diver mini-game.
Burrow into rings and emerge through rings to build your score.
Reach at least 5,000 points.
Collect Tunneling Codex as your reward.

How the Ring Dive Mini-Game Works

Ring Diver is a burrow-based score challenge.

You earn points by burrowing into rings and emerging from the ground through rings. Chaining successful rings together helps build your score more efficiently.

Golden rings can clear the current screen, while multicolored rings can be used multiple times. The challenge also introduces hazards such as sweeping lasers and falling bombs, so maintaining your route is just as important as chasing points.

Your goal for Tunneling Codex is simple: reach 5,000 points before the run ends.

Tips for Reaching 5,000 Points

Focus on clean routes through several nearby rings instead of chasing isolated rings across the screen.
Try to enter one ring and emerge through another whenever the layout allows it.
Chain successful rings together to build score more quickly.
Use golden rings when available to clear the screen and keep the run moving.
Multicolored rings can be used more than once, so do not ignore them after the first pass.
Avoid forcing risky routes when you are close to 5,000 points. A safe final sequence is better than losing the run while chasing one difficult ring.

Tunneling Codex Video Walkthrough

This video walkthrough shows the Ring Dive challenge and the route used to reach the 5,000-point score required to obtain Tunneling Codex.

Watch the original walkthrough on YouTube .

What Does Tunneling Codex Do?

Tunneling Codex is a Utility Trinket that changes how Mina's burrow movement works.

Normally, Mina must land before beginning another burrow. With Tunneling Codex equipped, holding Jump lets her repeatedly burrow without needing to land first.

This makes the Trinket useful for sustained underground movement, water-heavy routes, exploration, and movement-focused cleanup.

Is Tunneling Codex Worth Getting?

Yes. Tunneling Codex is one of the more distinctive mobility Trinkets in Mina the Hollower.

It does not directly increase damage, but it changes how freely Mina can move through burrow-heavy areas and can make certain traversal situations much more flexible.

It is especially useful for players doing exploration, backtracking, and 100% cleanup.

Tunneling Codex Details

Effect: Hold Jump to burrow repeatedly without needing to land.
Location: Sandfalls / Ring Dive Parlor.
How to Get: Score 5,000 points in the Ring Diver mini-game.
NPC: Ring Master.
Entry Cost: 100 Bones per attempt.
Category: Utility.
Slot Cost: 1 Trinket slot.
Sell Value: 1,250 Bones.

Tunneling Codex Checklist

Reach Sandfalls.
Travel through Bone Junction.
Find the Ring Dive Parlor.
Speak with the Ring Master.
Pay 100 Bones to enter the Ring Diver challenge.
Score at least 5,000 points.
Collect Tunneling Codex.