Alone is a post-apocalyptic horror which plays along the «man against enviroment» lines. I much appreciated its descriptive dryness; the fallout narrative is told through observations.
Puzzles were OK, sensible if sometimes déjà vu (Spoiler - click to show)(the fusebox one I did not like, guessing which part of the station is powered at the moment).
If you like the genre, this is a very good production!