Nice pulse-pounder!
This is a game that gets the heart racing and the adrenaline pumping. Without the brow-level frustration. You, sir, are awesome.
If I could offer a suggestion: perhaps give the player a bit more control over how things play out in UA3? Not sure about others, but I'm a guy who likes to manipulate parts of the environment for greatest effect.
For example, you could throw in the ability to assassinate a few guards as well. Since the game's centered around strategy and stealth, it'd be a great way to distract the guards from the target. For instance, you kill a guard, and the other guards move in on his location to get you, giving you an opening to move in on the target. However, each guard killed increases the time on the alarm and makes the other guards more sensitive. Kill too many guards, and the remaining guards call for backup, bringing in more guards. Incentive for the player to NOT try to kill every guard on the map before capping the target.
That way, the player can force an opening on the target, while not effecting his margin for error.
Just my two cents. Cool game! Keep up the good work!