I've really surprised myself with this game. I usually suck when I start a new game in a series I haven't played before (as, discounting the demo, this is my first Deus Ex game). And I mean REALLY bad. Assassin's Creed was an absolute disaster my first time. But I am fucking great at this game! I thought it was just luck, but damn, I'm kicking ass!
Wall of text on some tips.
For those running out of ammo for the Stun Gun, P.E.P, or Traq rifle, either use it sparingly, or upgrade hacking. I've found a LOT of non-lethal ammo in areas I had to hack into. Merchants sell them in spades as well. P.E.P ammo is RARE. Only use it if you absolutely HAVE to. NEVER use weapons when fighting one enemy, or enemies far apart. Knock them out, wait for your battery to recharge, then take the other out. You can knock out one of two enemys if they are close together, by just ensuring that the one that you are not knocking out, has his back to you at the time. There is no in-game 'noise' that enemys can hear when you do a non-lethal takedown that I have noticed.
ALWAYS CROUCH, in 'Give me a Challenge' at least, you don't make any noise when crouching.
@girl_in_background: Just a tip, but look for vents. Vents are a godsend for stealthy players. I got into only one true combat area in the first mission, I passed all the others through vents. Hacking is also great. Inventory and hacking were my first upgrades, and still my most useful.
Back on topic:
The merchent is in a 'secret' door in the brothel near the landing pad. I think the door is on the bottom level, where the manager is. Some people discuss it near one of the entrences to the second distric you can go in China.
@4173: Same. I killed only two guys at the start, didn't give it any thought at the time.
Are the 'alerts' in question when the mini-map thing says HOSTILE? I've had a lot of those when I run at an enemy and do a takedown. If not, I only had one real alarm.
I just got back from Montreal (So happy that they made the heart of global news in Canada.) so I don't know what these 'docks' are, but I have 60 tranq ammo, 8 P.E.P.S, and 34 stun darts. Bring It.
aaaand back off topic:
How does this compare to the first game? I played the demo for the first game twice in a row, it was the best game I had ever played, but this seems pretty close to it.
Holy crap I wrote a lot!