Use a Steel prosthesis on the thorax or abdomen to replace a missing arm or leg. Its release description says 10 INT is needed to attach it reliably and that scrap is used for repairs.
Before attaching
Confirm the extremity is fully missing. The game’s failure messages explicitly warn when none of the arms or legs are fully dismembered and tell you to check for remaining stumps.
A damaged but present limb is not the same as an absent one. This guide does not recommend removing a recoverable limb just to use an item.
Attachment interaction
Use the prosthesis on the body region specified by the prompt, then reinforce it using the displayed material pieces in the minigame. Do not drag it onto an arbitrary hand slot and expect attachment.
Below the stated INT requirement, failure is possible. The exact failure chance is not supplied in these strings, so this page does not invent one.
Afterward
The item is described as comparable to a normal limb in most ways, not universally superior armor. Inspect condition and repair instructions. Prosthetics were added in the release 1.0 notes, so older demo guides and mod versions may not cover them. See INT and crafting risk before attempting the procedure.
Sources & version notes
Reviewed against the primary sources below. Version-dependent details are identified in the article; these procedures have not been personally playtested.
- Developer release 1.0 English reference: tutorial, items and status text (2026-11-11 checked)
- Official Release 1.0 Patchnotes (2026-11-09)
Compiled from public sources. We have not personally played or tested these procedures. Check your installed build and its tooltips when details differ.