Recently completed S.T.A.L.K.E.R. Lost alpha Developers Cut 1.4007
Also recently completed Quake Epsilon - i.e. Quake and it's expansion packs with fancy new graphics.
About to start Quake 2 Berserker mod - i.e. Quake 2 and its expansion packs with fancy new graphics.
And I'm about to start Homeworld Deserts of Kharak. After which I'm going to do a narratively chronological binge of the entire series (HWR, Cataclysm/Emergence, HW2R - and HW3 once it gets released.)
FS wise - I recently completed Shrouding the Light, Bem Cavalgar, The Aeos Affair, Shivans, ASW, Scrolls, Walking on Ashes and Boomerang. Not sure which campaign to try next - there is so much to choose from