Shadowgounds plays like a collage of familiar shooters - and that's not a bad thing.
Like "The Thing", Shadowgrounds is atmospheric, engaging, and flawed. The voice acting is adequete, the facial animations stiff and the enemy AI at a Doom II level. What Shadowgrounds does have going for it is excellent sound design, solid feeling (and looking) weapons, nicely varied enemies, relatively challenging puzzles and a stack of tongue-in-cheek references to sci-fi gaming and cinema classics such as Aliens (movies and arcade shooter), Doom, The Thing and Starcraft (to name a few).
For twenty dollars, Shadowgrounds provides a surprisingly lengthy and satisfying gaming experience - if you can look past the corners that have been cut in its development.