will OS4 version of QUAKE II support any of the mission packs?..ie ( ground zero & the reckoning..
Only those ATM that don't require any special game dll. If it is "just" levels and data files, it should work. Anything else needs to be recompiled.
Quake I mission packs will not work with Quake 2.
About Silent Thread, dunno, if it works without any additional patches to the binary, it should work with the Amiga version.