Very clean looking game, movement felt crisp as well. Only issue I found was that the enemy things would occasionally go through some of the walls, and I wasn't quite sure what to do. All in all very good game :)

Really beautiful environment and lighting. The caves parts had a great sense of scale (although the big props kind of made the sub feel like a toy model a bit in parts). And the needing to fire flares to light the way is an interesting mechanic. Wasn't sure what to do at the artifact though.