Hey Wings, you really do have the making of a great AAA creator. I really liked this game. The story and the gameplay was great. This wouldn't be a review if it didn't include constructive criticism though.
I did fine a few things I thought could use some looking into. First was the animation from running to walking. It kind of glitches out a bit when switching between them, which isn't too much of a big deal. Another thing, since the setting is underwater, I don't think doors would creak when opened, if they would, then I believe it would be muffled. As would the footsteps and the pretty much a lot of the sounds.
What I did like were the models, these bad guys look so crazy and the way they sound is great. Kudos on that. The movement as well. I liked how the player wasn't able to run for too long before getting tired. That was a smart move. The gunshots as well. It really felt like I was actually shooting underwater.
The game was great and I would love to see what comes next.
Also, knowing you, I would really like to try out Uni-FPS Controller, not only because I like your stories but, because I do want to support you. Give me some time and I will.
Anyway, keep it up dude!! I hope the best for you and your team. Good luck!