"Space Quest V: The Next Mutation" is the only of the Space Quest saga, along with the Space Quest I VGA, to not have an official talkie edition made by Sierra. The fantastic work of voice synthetization by cdb-boop fills the gap. Technically you'll need v.1.04 of the game already included with collector's editions.
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At the moment it really works only if executed trough latest DOSBOX, DOSBOX-X or the command prompt which is closer to genuine DOS. On Scummvm gives problems (detected but not recognized version in first place), but if they added support for that cool spiffythedog's unofficial patch for Space Quest I VGA and for NRS/Sun Software patches, we may see the full support of SQ5 dub mod soon.
Check out also this more "homemade" King's Quest 4 Talkie&VGA edition.
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