Granted, this is just the demo, but the demo is worth 20 minutes of gameplay, tops. There are several different strategies you can take to conquer the terrorists and capture the Bio-suitcase, but you'll find they are all pretty weak, and without much flair. The menus are easy to navigate, and gameplay is decent. However, the Delta Force games are just plain slow to begin with. The AI is pretty bad, but then again I didn't play it on the hardest level, which might make things more interesting.
Graphics are okay.
Be glad that the voxel engine is gone, but don't let that confuse you because this engine isn't much better. The demo has many issues, including some horrendous clipping problems. On numerous occasions I was being fired at by some soldiers who could apparently submerge their entire bodies in sand dunes. The weapon sounds are fine. The radio chatter gets old quick, though.