30 minute long gameplay demo of Deus Ex: Human Revolution released

After the twelve minute long gameplay footage of Deus Ex: Human Revolution that was recently released, and a fantastic, breathtaking gameplay trailer, we thought that was the last we would see of the game before its release. But Eidos Montreal has released a three part thirty minute long gameplay demo of the game, showing a really cool segment of the game. Check it out below. Thanks, IGN.