G alienBuildPoints

Usage
This variable changes the maximum amount of Sentience that the alien overmind can support.

Setting it to 0 or something not-a-number will prevent the alien team from building anything (other than the overmind etc), although old buildings over the limit will not be removed.

If the remaining build points are over 999 then the client will just display 999 left, and setting this cvar to large numbers is used by some servers to provide the illusion of "unlimited" build points.