I've been playing Apocalypse again this week, and i couldn't help but notice several similarities between the aliens in the XCOM FPS and the aliens in Apocalypse.
First thing is that both aliens can teleport around, use energy shields and come from another dimension.
Second, is that they apparently don't want to invade, but consume/terraform our world since they can't survive here as it is.
And the third similarity.. well.. i'll just let these pictures speak for themselves:
Notice any similarities? These blocks, cubes and things... both aliens have them as part of their worlds.