Download of the mod: https://www.moddb.com/mods/doom-64-retribution
Addon for this mod: https://www.moddb.com/mods/doom-64-retribution/addons/doom-64-retribution-project-void-v101
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https://www.youtube.com/watch?v=0Tp_Y4d-M8c
Go download this version have invasion mode: https://allfearthesentinel.net/zandronum/wads.php?user=2740
Version used on video is UNOFFICIAL v5.9.7
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https://www.youtube.com/watch?v=DJECfZx_OaY