If anyone sees you while you're trespassing (upstairs) everyone will turn hostile (one person seeing you = everyone, oddly enough), I'd bet that's what's happening. It can be tricky to come back downstairs without being spotted (even when using tricks like timestop and blink people seem to see me). Note that you can totally kill/knock out the upstairs guards without alerting everyone else if you're careful; every playthrough I've done I've KOed or killed the guards upstairs and I usually get out scott-free.
Try exiting the downstairs via a more discrete way: you can leave via the balcony (the door to the outside from the first bedroom after the stairs) and the guard outside won't "detect" you (he's also easy to knock out or kill, but it's pretty unnecessary). He just politely asks you to stop trespassing. Drop gracefully from the balcony and no one should turn hostile (note that falling on someone's head, as I did the first time, counts as an attack).
Also note the basement, oddly, doesn't count as trespassing, so I'd poke around all the "safe" areas before going upstairs, and making a real save before going upstairs, since it's usually when things go south in this mission.
It has been a while since I played Dishonored, but I remember this scenario, and also spent some time (20 ish attempts) trying to befriend some or all of these thugs. As far as I can tell it is not possible. It seems however you approach the situation, they become aggressive as soon as they know you're there.
I could be wrong of course, but I don't think theres any other way for this to play out
Wikipedia's article on arrow keys covers some of the history of WASD:
The scheme wasn't popularized until competitive play in Quake and subsequently QuakeWorld made clear its advantages over the older arrow key configurations.
Competitive Quake play only popularised the layout though, as it wasn't the first time they were used:
In the same year that Castle Wolfenstein was released, 1981, the game Wizardry used the AWD keys for movement in a 3D dungeon. Both the programmers of Castle Wolfenstein and Wizardry were users of the earlier PLATO system where the game Moria used the AWD keys.
So they were popularised by Quake and the FPSs that followed and made it default, but they'd been around as a control scheme for a while already.
It depends if a detection meter is shown above a Survivor's head upon them detecting your presence.
If you get a Survivor's detection meter up until it turns red, that will count as them detecting your presence, and will cause you not to get the 'Ghost' achievement. This may be a "motivation" to put Survivors asleep. This is the same for other NPCs, not just Survivors.
If a Survivor or any NPC is friendly to you or does not mind your presence, a detection meter won't appear and that will not count as 'detected'.
I noticed that on a high chaos playthrough, Survivors will have a detection meter and might alert hostile, armed NPCs. While on a low chaos playthrough, they won't mind your presence (no detection meter).
As you know they emit light and you are easier seen in light. So by blowing the candles, it will get darker and it will be easier to hide.
I do not think the candle above has any purpose since it is in a well lit area.
The option you want is in the Keyboard pane of your System Preferences:
Unfortunately this applies to all applications, not just WoW, which is kind of a pain because almost no other Mac OS X apps use the function keys for anything.
You immediately get a game over if you KO or kill anyone that is actually required. If the game let you kill them, they're not story-relevant anymore; this happens to a few NPCs you can't kill in earlier chapters at certain points in the game. Just continue the level as normal, only reload if you're doing a no kills/unseen run and you messed up your 'streak'.
Note that non-essential sidequest NPCs can be KO'd or killed without a game over. Depending on the character this may not matter at all or it may make the quest impossible. So at worst it's possible to lock yourself out of some bone charms/relics/money. If you choked the Witch she'll actually just warp away and be hostile to you.
Note that there is absolutely no way to wake up a KO'd character. They will stay unconscious until the level is reloaded (via a save before the KO or restart) or until rats/water/you kill them. (KO'd characters can also despawn, but if they despawn while alive they count as alive as far as the game cares)
You will be able to activate and play the DLC on your PC.
As long as the game supports Steam Play there is no difference between Mac / Windows / Linux keys.
I don't know of any multi-platform games on Steam that don't support Steam Play. However, always check before you buy.
Apparently it is very possible to do this, as seen in this video.
To summarize what happens in the video: It looks like you will need to exploit jumping over walls and sneaking closely behind the guards to get into the prison yard. Once you make it to the control room, you are able to climb onto the pipes (not sure if this was actually intended or not, but it looks like it works!). You can use your weapon on the pipes to lure the guards away from the door, so that when you blow it up, you can quickly dash through the opening and jump into the water without being caught.
There is not much you can to, other than deploying Heat Sink and Multi-hack mods.
If time is the limit, the most efficient would be:
Hack 1 time
Deploy Very Rare Heat Sink: Will set cool down time to 90 seconds
Deploy Very Rare Multi-hack: Will give you 16 hacks before burnout
Hack 16 times
Makes 17 hacks in ~24 minutes.
If you have a buddy, let him deploy the same mods you did. That will give you 22 hacks with a cool down time of 58 seconds, so potentially 22 keys in 22 minutes. For each of you.
If you have more time, obviously you should wait with deploying the Heat Sinks to max out the hacks before resetting.
If you don't want to waste the very rare mods, do not need 22 keys or have more time to wait, use only the rare & commons. Here is a very nice tool to calculate the cool down times and max hacks with any combination of deployed mods.
The critical area for an unconscious body is their head.
Moving them around and having their head hit things will kill them.
Dropping heavy things on their head also kills them (whale oil canisters can do this).
Dropping them some distance will also kill them.
Drowning with their head submerged will kill them.
Rats will go after unconscious bodies and eat them.
I finally figured out how to do this. It's easier as Dustkid, but I was able to do it with Dustman also.
You want to jump up the left-most wall. Jump from the platform with the bust on it, then run up the wall, jump off and then back onto the wall, then run up it again. At this point, you want to be right at the corner where the vertical wall turns into the 45-degree angled wall. If you jump off the vertical bit while holding up, close enough to the angled wall, you will run along the angled wall as well, giving you a 3rd wall run even though you used all your jumps. This will be enough to land on the platform above.
Golden keys are tied to your SHiFT account, and cannot be bought, sold, traded, or otherwise used for any purpose but opening the golden chest in Sanctuary.
According to an official source on the Gearbox forums:
Keep in mind that you cannot trade or sell Golden Keys, and once you’ve used a Key to open the Golden Chest, that Key is gone for good.
However, the loot you get from the chest is just normal loot and can be traded normally.
If you need more on a character, you might consider keeping track of a list of SHiFT codes - there are codes for multiple keys that pop up from time to time.
You have to disable the option "ENABLE Simple Command Card" in Game Options.
Then you will see that Hold is "E" and Patrol is "R" if you have the QWERT-Keyboardlayout.
An unconvenient alternative to patrolling would be setting a lot of waypoints with Shift-"T"-leftclick