Case study

Underworld Exhumed: reconstructing Ultima Underworld I and II

Pairs reconstructed DOS sources with native ports of Ultima Underworld I and II. The upstream documents Exhume-based byte-matching builds, routine-level comparisons and recorded-session replay against DOS.

Targets: Binary · Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-10-20

Requirements & limits

Native ports target macOS, Windows and Linux. Playing and checking against the originals requires your own matching game files (the README targets GOG releases); byte-matching builds additionally require the documented Turbo C++ 1.01 and TASM 2.0 inputs. Native-port compilation itself does not require game data.
The MIT license covers the project’s own tools, documentation and added annotations/structure. NOTICE explicitly excludes rights in the original games and derived game code; optional MT-32 playback requires separately obtained ROMs.
Recorded sessions and routine tests provide bounded upstream evidence. Full tests require licensed inputs absent from the public repository.

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The description was reviewed against primary sources.

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Primary sources

README.md GitHub · abedegno/underworld-exhumed · Revision e5deadd
docs/PORT.md GitHub · abedegno/underworld-exhumed · Revision e5deadd
docs/BUILDING.md GitHub · abedegno/underworld-exhumed · Revision e5deadd
LICENSE GitHub · abedegno/underworld-exhumed · Revision e5deadd
NOTICE GitHub · abedegno/underworld-exhumed · Revision e5deadd
Makefile GitHub · abedegno/underworld-exhumed · Revision e5deadd

Requirements & limits

About this entry

Primary sources

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