Saving the world with a big, pink, French cyborg: this perhaps isn't the XCOM expansion we asked for, but I think it's the one we needed.
This time around, we get robo-folk and genetic modification, and one giant leap further away from XCOM's parentage.
Enemy Within is a proper expansion - like in the olden days - for last year's XCOM: Enemy Unknown, which was a very different reworking of 90s ultro-classic X-COM: UFO Defense.