It seems that the demo is out. Okay, in my opinion... it blows so hard. I was expecting ALOT more from this. Looks rushed and jerky to me. I like the "timemachine" effects tho. (stop time, reverse time, slow time). Sounds good but it's technically poorly executed 
Don't try it
The demo for TimeShift is now available, offering the promised sample of Saber Interactive's upcoming 4D shooter. Word is: "The demo includes one full level of the game, where you must use your timeshifting powers to infiltrate the perimeter of a heavily guarded building to meet an important rebel contact on the top floor."
Downloads:
http://www.3dgamers.com/news/more/1096483871/