Hey, I'd really like to find this game:
I think it was very old, took place underwater. Yes, I recall precisely you were driving some underwater sub or something in first person, and you had to harvest some orange-red mineral things.. then you returned to the base and you dumped what you collected in some container which made a screeching sound I can remember to this day. And you had the ability to shoot missiles or stuff.. and if you shot the other collector subs you were arrested by two police submarines. Pretty original having police submarines.. I also recall some figure in the bottom right with a blury face giving me instructions, I think he always said "harvest forium" or something resembling the term. Also I remember if I went too deep the pressure would roflpwn me, and I had no clue what to do, since everywhere I went, nothing happened.
Also you could enter the base and.. well pretty much it, watch your sub.
And you could surface and see a nice island .
That's all I remember.