It is just a tech demo, but I have played it through 4 times on Delta, and on easy level my friend and I spent hours trying to abuse the physics engine and find creative ways of accomplishing missions
Can't wait for the next one, it's the most graphically beautiful game I have ever seen. And it does take a high end PC to do it justice on the visuals! (plus the physics engine takes some serious processing power)
Sneaking around behind enemies in stealth mode is just funny.