Practical use
- Read the skull and number as the highest Pressure already beaten with that Genetic; it does not add another hidden penalty to the next run.
- A 1 beside Standard and a 3 beside Challenger or Chosen means those Genetics currently have different personal clear records, not different skull costs.
- The in-game Codex Genetics menu also exposes the highest Pressure beaten per Genetic, which is the useful place to audit all-genetics completion progress.
- Splicing or combining Genetics does not make the skull a difficulty price; keep using the Codex record and the run-start number as progress markers.
- Do not confuse this menu symbol with the purple heart/skull seen over creatures in the world; that separate icon marks a charmed creature and is covered on the Purple Hearts page.