They cull out applicants whose IQ is above 100 and during psychological tests, also cull those who show empathy. True story.
*Not a true story at all.
Bought this after a pcgamesn preview the other day, it only lasts a few hours but its good fun. Gets pretty intense when there are 7 different hives pumping out thousands of bugs and new hives popping up sending cloned soldiers at your base. The upgrades and weapons are all very satisfying. It's a mini 40k experience sending in marines with miniguns and flamers against the swarm while thunderhawks strafe the hive.
You tried the weekly challenges? Adds to game life.