While it's reminiscent of many other games, Singularity is greater than the sum of its oft-borrowed parts. The time & space manipulation in puzzle solving has a Portal-esque feel to it, the gunplay and sci-fi elements are evocative of the Half-Life series, and the alternate reality's sprawling landscapes filled with intricate details and satirical propaganda clearly show that BioShock rubbed off on the developers. In fact, the Time Manipulation Device (TMD) employed by the game is essentially a Plasmid from BioShock – equipped on your hand, you'll use it to do things like reverse or speed up the age of items and enemies to bring variety to combat and navigate the devastated, apocalyptic terrain.
Though Singularity is certainly guilty of taking more than a few elements from other games, it puts its own spin on those elements well and creates enough of an original feel to consider it a legitimately good game in and of itself, making the experience an entertaining entry in the first-person shooter genre. The notes, recordings, and projector footage you find from the past (again, sound familiar?) range from amusing to frightening, and help to further illustrate the game's 1955 & 2010 versions of Russia which you jump to and from in order to rewrite history and correct time travel paradoxes. The consistently thick, tense atmosphere aside, this is the game's strongest asset, I feel, and could've been explored more thoroughly. This and its disappointing length are its greatest flaws, though the fact that the majority of players find the game too short shows just how enjoyable it is. When it was over, I wanted more of it, and I intend on a second playthrough – something the game encourages, as the plot twist at the conclusion recontextualizes the events preceding it.
Singularity isn't the most original or creative game, and it grazes the surface of deeper themes (the illusion of free will, the responsibility scientists have to mankind) in favor of maintaining a breakneck pace, but it does so many things right that its flaws are forgiveable and, in the grand scheme of things, minor. I consider this a must play for anyone who enjoys action or first-person shooter games, and especially the ones I mentioned in this review as well as others in that vein.