I remember way back in 1991-1995(?) playing this pc game where you were this underwater diver, and you would drop down into a submarine(?) or underwater cavern(?) hunting treasure. It had well done sprite artwork (as I recall,) and a 2.5 perspective that looked a lot like the old Sega Genesis game "Landstalker". (The camera angle was like Diablo games.) There was a time limit before your air ran out, and you'd go from room to room...

That's all I remember. I was a kid and it was so hard I couldn't get past the first couple of rooms anyway. Any idea?

I know what you're talking about because I've played it before, and I'd also come across it recently on Mobygames. I just cannot, for the life of me, remember what it is called too.

Maybe this?
http://www.mobygames.com/game/dos/treasure-trap

EDIT: removed the Cadaver link, it's not underwater, silly me!

Underwater game? "Archimedean Dynasty"!

*err no*

Yes! That's it! Thanks alot!

That sounds like a really awesome concept for an atmospheric exploration/survival game with a tense Cryostasis-esque edge. But the screenshots look like it wasn't really going for that :P

I don't know, I just happen to know the game, but I actually have never played it myself.