it's an interesting take of the state of aliens as they exist in game today, but there's also a very down to earth reason as to why alien feel an afterthought:

it's an interesting take of the state of aliens as they exist in game today, but there's also a very down to earth reason as to why alien feel an afterthought: 2012-2013 had a huge surge in tower defense genre popularity, while logistic optimization games were relatively niche.