Pretty sure this is 8.5 anyhow. Just got the game a few days ago, and eager to see everything it has to offer. Went into do a ground mission to recover a crashed alien, fought my way all the way through with no troubles, but at the very end, after I kill the last alien, it freezes up on the "Hidden Movement" screen and refuses to do anything else. There's no progressions possible without recovering tech from ground missions, but I'm unable to proceed past a Ground Combat mission.
I've started numerous new games (Had a few where I couldn't get into the spaceship to kill the last alien, due to the placement of the crashed ship), and each time I'm able to go all the way through, as soon as I kill the last alien, it freezes.