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USA cycle coverage adds 8,664 observed native starts across five areas, original room loaders, combat, ending and credits. The retained legacy source also includes its qualified music/enemy continuations and save-state tail-resume correction.
All 232 retained replays remain exact against prior native/interpreter hashes, pictures and full states; interpreted ROM cycles fall from 428,886,431 to 804, with zero RAM fallback. Seven enhancement modes and fresh-process replay also pass. Assisted original Kraid/Ridley victories, final-chamber Zebetite/glass/Mother Brain damage and escape timer, ending-elevator collision, visible ending and credits pass stock and 32:9. Actual widened crawler packets have 56 aligned tiles and nine visible margin residents. The final-chamber checkpoint contains one active Zebetite; the full approach and escape traversal are separate. Use matching renderer/actor settings for visual state QA; stock-origin snapshots can lack widened room metadata until a room streams. Expanded progression qualification covers USA; PAL retains its earlier corridor scope.
Windows x64. Matching North American/shared NTSC retail ROM required; no ROM is included. Extracted production package launcher/settings and representative gameplay replays pass. Audio is enabled at normal volume by default; optional enhancements retain their existing defaults. ZIPs exclude ROMs, BIOS files, saves, settings and debug artifacts.
Source: 6c281f253c9b4ac80b3c2fa18bb0ef3f78a1b7ec. Source changes: #1.