Still Wakes the Deep: Siren's Rest is an enjoyable, well made addition to the initial game Still Wakes the Deep.
The voice acting was very convincing. The visuals were solid. The mechanics were quite well made and intuitive to use, even if the third-dimensional turning system was a tad bit confusing at first. And the basic premise of the game was simply enjoyable.
However, it feels like nothing new was really uncovered in this addition. Perhaps if the creators added some extra lore behind the main character from the initial game, or if they explained some of the ambiguity of the terrorizing monster, it could have felt more like it actually added something. Instead, the game is rather short-only taking about an hour and a half to finish it-while it could have had more potential. It simply felt unnecessary in the end.
Though it might have been an 'unnecessary' addition, it was still quite an enjoyable ride. I particularly like the way the game doesn't make it too difficult to find what to do and where to go, without making it too easy to actually succeed. The way it takes place under water with the diving system also felt new, which really worked out.
Overall, Still Wakes the Deep: Siren's Rest is an enjoyable, though perhaps unnecessary addition. But it's definitely worth the time as a stand-alone without high lore expectations.
7/10.