It’s always interesting to look at a very old game and see the earliest glimmer of a subgenre that became well-established much later.
Mattel’s Dark Cavern, actually an Atari 2600 port of their Intellivision title Night Stalker, is a good example. On paper, it’s a simple maze game, but in practice, you can see just a hint of what would become stealth and survival horror gameplay in there.
We’ve got a fragile protagonist; we’ve got an emphasis on outwitting enemies; we’ve got limited resources. How long can Your Man survive in the Dark Cavern?