I've been stuck on the first stage of New York for a good long while now. It seems that putting the Electronics store all the way to the left is a good idea; when it's upgraded all the way, it can handle the initial rush like nothing else. So it's a good idea to maybe put off other upgrades to get that thing going.
Really, REALLY bad AI. I took out the three child molesters by sniping them as soon as they lit up. Like lemmings, their buddies just walked right up to their fallen corpses and lit up as well. Boom headshot, one two three. Come on, you can do better than this.
Enforced Silence shuts down the Sniper Bot. Was it intended to do that?
Also, the game gets buggy as HELL in the Challenges. My creatures don't respond to my commands, opponent's creatures are unblockable when they aren't supposed to be (Myrkin Rogue, for example), my creatures seem to have summoning sickness sometimes but not all the time, sometimes Sniper Bots can't attack after "shooting" but sometimes they can...
Great concept, but there are way too many bugs.
 "Hedgehog Launch 2"){kind=icon}
 "Shopping Street"){kind=icon}
 "Anaksha: Female Assassin"){kind=icon}
 "Mytheria"){kind=icon}
 "Tactical Assassin Substratum"){kind=icon}