Submerged: Hidden Depths is a fine game. It's not fine as in a fine wine, nor is it fine like the little dog from the meme sat in his burning house saying, "This is fine." Submerged is fine fine. It's neither impressive nor offensive, never quite boring but almost certainly not exciting.
There's nothing here that you haven't seen before, and once you've seen what there is you're unlikely to remember it a year from now. There's not a single moment in this game that will make you sit back and think, "Wow." In the vaguely arty, third person exploration genre Royal Rumble, Vane is the first one chucked over the ropes, Journey wins the whole thing, and Submerged was... were they in it? Did they get thrown out while you were at the bathroom? It doesn't matter.
If you think this is an insult; it isn't. There's absolutely nothing wrong with being fine and Submerged is certainly fine. If you decide to play Submerged, for around four or five hours you'll explore a strange, flooded world on foot and by boat, solve mostly menial puzzles, and pick up the occasional collectable. There's no bloat here. It's just a five hour journey; no drama, no filler, in-and-out like a violinist's elbow.
There's no mechanics, really, to speak of. There's no combat for us to discuss. You can't even jump on command — only at specific places. Submerged is a chillout experience about exploration with a slight story and basically nothing else, and honestly, we're okay with that. Not everything has to be explosions or sad-times-my-kid-died-and-now-I've-grown-a-beard depressing drama. Pop on Submberged as a palette cleanser between more involved titles or as an escape from the horror of reality and you'll be fine. This is fine.