It has some interesting features and is just a fun game.
The ability to stop, slow and reverse time is intersting.
Impressive graphics.
The weapon models look really cool
Cons:
They "tried" to make a puzzle game but failed.
They could have made it a lot better if they wasnt aiming for a christmas release.
A really bad story line.
Timeshift is not that bad of a FPS in my opinion. Definately better than the 6.5 score GS game it. There are very few, if any shooters, that use the features Timeshift uses. The ability to slow, stop and reverse time is really cool, you might think to yourself you wont need it, but you really do.
The models of the weapons you use, the karbine for example has a very cool look to it, as does the Scattergun, to be honest all the models look really focused on. The enemies are high detailed (considering you have full everything) as is the environment.
It does have a lot of problems however. The AI is very very basic. You run around in slow motion the enemies just seem to run away from you. If you go in stop motion you can go behind an enemy and with 2 enemies behind you the one in front wont even look behind him.
The enemies seem to be really easy to kill too.
The story line (or lack of) is very confusing. The opening cutscene makes no sense of what is happening, your just thrusted straight into the battle of which you have no idea about.
Despite the bad story, the voice acting is good, better than some games. The sounds overall are very cool and realistic.
All in all, this game is just for fun, and should not really be taken seriously!