I enjoy the base invasion mission but think it is lacking a little.
There is some fantastic artwork in this scene and some novel ideas. However the ploding aliens very rarely enter the base complex itself, preferring to waddle about on the surface, which is of course quite plain looking.
Perhaps, someone would be skilled enough to enrich this mission with a little wizardry in the scripts. Perhaps make the aliens rush the control room. If they detonate a bomb on that vicinity it is game over.
Regards,
Drazil