I do, still got it some where although it was never a game I got into, seem to recall it having layer that the sub descended through.
Shame theirs no PayPal option.
Yes those were thermal layers in the water that could be used to hide in. Subwar was a game that had a lot of tactics about it. I hope this Aquanox remake takes advantage of such gameplay mechanics too.
It will sure be nice to see what they can create with the UE4, I have seen a few underwater games on steam and none of those use UE4 and they look great so UE4 if they take their time to do it right should look amazing.