Timeshift is one of those gems that was left behind in a wake of bad reviews. To say Timeshift is a great game, or even original, would be a lie. But to say Timeshift deserves the bad rep it's been given would also be a lie.
The first thing most people will probably feel when playing Timeshift is that they've already played something very similar before. What earned this game its bad rep is the fact that basically every feature in the game is stolen from somewhere else. There isn't much originality here. If you've played Half-Life 2 you'll probably feel like you're in some form of a spin off where a more elaborate version of bullet time has been added on. The backbone of the game is stolen from Half-Life 2. An oppressed resistance fights the vaguely defined enemy. The games feel very similar. Bullet time is nothing new, and this game operates much the same way that Prince Of Persia does in its bullet time. It is a standard shooter that takes its pieces from other games and meshes them together.
That being said, Timeshift does what it does very well. It takes the great parts from a lot of games and mashes them together into something fun. If you're looking for something completely novel, this game is not for you. If that isn't an issue for you this is a game worth checking out. Everything has been done before, and while Timeshift doesn't try to hide that fact the game is fun. It won't blow anyone away, but it will be a good play through once. The boss fights can be a bit frustrating, especially the end one. Other than that it's an enjoyable experience.
The graphics, though I'm sure fine for their time, look poorly done today. The sound is nothing to write home about, and there's no one to get attached to. Not even the main character is very likeable as neither the plot nor the character has much depth to them. The plot follows essentially the same principles as Back to the Future with guns.
The multiplayer, while actually novel in what it does, is a barren wasteland of activity. No one plays it, and unless you find a boosting partner you'll have a very difficult, if not impossible, time finishing the multiplayer achievements. It's a bit of a shame that the multiplayer is so dead because it is actually very unique. Although, I have to admit, from the few actual non-boosting games I did play it's not very much fun.
Overall I would say Timeshift will never be a classic, but it will take the best parts of some of the classics and mesh them together into a game that is good, not great.