This is most definitely not a final release, as Goldhawk warn early adopters on the Steam store page that the Early Access version has “inconsistent game balance, occasional missing art and UI elements, and bugs or crashes”. I certainly encountered all of these, including my savegames getting corrupted.
Think of the Early Access of Xenonauts as a cheap pre-order that allows you to play an incomplete version of the game right away and gets you the final version on release. A taster if you will, and right now it’s a very good taste. While I was satisfied with XCOM: Enemy Unknown I don’t deny that a tougher and more deeply strategic version closer to the original would be very much appreciated, and Xenonauts is looking to be the best around.
I think it’s ironic that after 15 years of imitators never getting the X-Com formula quite right the game that finally does only turns up after the series has returned. Fortunately however there’s still a place for both reboot and spiritual successor in the hearts of X-Com fans, and for the hardest of the hardcore Xenonauts could well be the game they wanted all along.