Unfortunately, The Thing is more like a subpar Freedom Fighters than a truly engaging "sequel" to the 1982 film. It has the requisite squad tactics and some neat ideas governing emotional responses from your teammates, but those ideas are poorly realized and unfulfilled, and in some cases downright misleading.
The Thing is somewhere between a sequel and a loose remake of its parent film, set sometime after those events but essentially telling a remarkably similar story, at least at first. An alien race has surfaced in an Antarctic military research base, with the alien infection often taking the form of your human allies. As you investigate what happened to your colleagues, you must maintain their trust, in addition to watching your own back for lurking thing-creatures, which emerge out of your pals in a particularly gruesome fashion.
This is a fairly standard third-person action game with the exception of a neat trust/fear mechanic for your squad. It's neat-o in theory, anyway. Your squad (of up to four) get all a-scared by the alien creatures, as well as by gore, darkness, being alone, and so on. They'll hunker down and won't be helpful to you if they get too scared, so you settle them down by forking over firearms or health. You also never know when one of them will morph into A Thing, which you can check by drawing blood from them at any time. A cool idea, for sure, except that it doesn't work at all: a guy who tests positive for Human will turn around a minute later and reveal himself to be Thing the next, seemingly only because you're moving on to the next level and your squad can't carry over across the loading screen.
The Thing has more problems, unfortunately. Not only do the squad tactics barely function, but the enemy AI is generally incompetent and behaves strangely most of the time. The terrifying threat of aliens is rendered not so terrifying when they can barely navigate most doorways. Additionally, this game has some incredibly frustrating missions later on, only because the checkpoint and save systems are so poorly implemented. There's a whole lot of backtracking, repetition, and memorization depending on when you can find a save point, and how well you were doing when you found this save point.
In general, The Thing is not a good game. It's a decent quick fix for anyone desiring of a Freedom Fighters-style squad shooter, but it gets old quickly and does follow through on many of its promises.
