How to Break Crackstone

Straight answer: your starting tools will never break it — "The Shovel and Gun do not affect Crackstone." You need an advanced digging tool: the Rocket Launcher (Research Tier 4, 2,000 Gold) is the documented route, alongside the Drill, Laser, and Void Gun.

What Crackstone Is

"Crackstone is a hard material that can only be broken with more advanced digging tools." It has 1 HP against tools that can hurt it, and yields nothing: "When it breaks, nothing remains." It is a barrier, not a resource.

It cannot be burned and cannot be melted — force from the right tool is the only way through.

The four working tools are identified from the wiki infobox's icon set; the Drill, Laser, and Void Gun have no captured wiki pages yet, so their unlock costs are unverified.

The Documented Route: Rocket Launcher

The Rocket Launcher is "a ranged weapon firing explosive rockets," unlocked through Research at Tier 4 for 2,000 Gold. The wiki confirms the matchup directly: "It can destroy some terrain that is impervious to smaller digging tools (such as Crackstone)."

How it behaves: the missile travels slowly for a short distance, then accelerates hard; on hitting a solid surface it explodes in a wide, roughly circular blast. It can fly around 55 tiles before despawning.

Rocket Launcher Upgrades (Fluxite)

The launcher holds 3 rockets initially and reloads slowly on its own — the first two upgrade lines directly address that.

Practical Notes

• Do not waste early-game time shooting Crackstone with the Gun — the wiki is explicit that it has no effect.
• Since Crackstone drops nothing, blast the minimum needed to open your path; the rocket's wide blast radius usually clears a walkable hole in one hit.
• If you have unlocked the Drill, Laser, or Void Gun, all three also work (their efficiency comparison is unverified — no official data).