The missions in the first and second third of the game are good, that's the most fun I had since you can approach environments, enemies and challenges in many different ways creatively and with stealth, felt very refreshing from other shooters.

Final third though, I just don't know what happened. Felt like it turned into another game, became entirely linear and took a nosedive in quality.

The zero gravity section is absolutely terrible, looks amazing, but gameplay-wise felt very off and fighting enemies was very frustrating. And that final boss... just that whole segment from when you first get into the mountain and stop fighting humans to fight flying squids till the very end, ended up making me hate the game by the time I was done.

It would've been a solid 4.5/5.0 game easily if they just had removed the aliens part. Seriously.