Quote Originally Posted by anagrama
And some Amiga game I played years ago set on a sunken ship, or maybe submarine. Can't remember much about it, but the main character wore one of those big old divers helmets.
Edit: Nevermind, I thought it was CadaveR, but it's not. I do know exactly what game you're talking about...can't think of the name tho!

Anyway, here are some screenshots of CadaveR, also isometric style view "floating in space:"
http://www.mobygames.com/game/dos/cadaver/screenshots/