AI- Oxi-moron in this game!
Squirley comes to mind.
Next, AI. If you change into a guards clothing, somethings you walk in and do your business, others, you walk up, and bingo...you're dead.
Unpredictability can make a game fun, but there was no rhyme or reason to what would work, and what was a waste of your time. Do I run and gun, or try the stealthy approach. Neither worked well with any consistancy. In "Splinter Cell" you're stealth. This game just liked to screw with you at the least opportune time.
Many people liked this game. I really hated it.
For me, there was no way to get a feel for what plan of attack might get you in or out of trouble.
Between not being able to aim and fire without hitting a cloud, and dying every level cause the game couldn't make up it's mind on whether it was stealthy or not, I found it extremely frustrating, impossible have fun playing.