omnispeak

Omnispeak is an open-source reimplementation of Commander Keen
episodes 4, 5, and 6. It aims to be a pixel-perfect, bug-for-bug
clone of the original games, and is compatible with savegames
from the DOS version.
Omnispeak also includes several new features, including:

Improved graphics scaling and compatibility support.
Dramatically improved joystick/gamepad support.
QuickLoad and QuickSave support (F5 and F9 by default)
Support for real AdLib / OPL2 compatible sound cards
Support for the OPL2LPT

NOTE:
To play the Commander Keen games with omnispeak you need the
original game files!
Run

omnispeak-keen4
omnispeak-keen5
omnispeak-keen6

from the directory where the original game files are located.

          

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License: GPL-2.0-only
URL: https://davidgow.net/keen/omnispeak.html