This pk4 archive contains a Dark Mod Fan Mission.
It need not be opened but just put into the darkmod\fms folder.
It can then be played via the Dark Mod New Mission menu.
For details see: http://www.thedarkmod.com/
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Pandora's Box

Author: Jesps (Jesper Thingholm)

Contact info: mr.jesps@yahoo.dk

Russian translation: charisma