Heavy Metal Death Can

Set on a military submarine deep in the ocean in an alternate universe based on 1970s Sweden, you must fight against the terrible Sludge, an all-encompassing filth which has turned your crew into horrific, oil-spewing zombies. As you sneak through the dark, echoing passageways haunted by the sound of your own footsteps, you must seek out survivors and uncover clues to discover how and why your serene ocean workplace is now, quite literally, a death can.