q3-like mods supporting:
we did not remove mods support completly - there is still a chance, that it will work, but i've never tested it - and there is really a lot of the code in the client binary (the geoscape and basemanagement stuff, e.g.)
if someone would come up with a mod like syndicate (there were some attempt in the past) we could think about modifying the code and put the the geoscape stuff in a lib named cgame.dll (like q3 does)
but without a team that would like to create the code and the artwork for a new mod this work isn't currently on my todo list.