There is an important update post about these combinations, you can find that article here.
The number combination is 138. This guide explains how to open the safe without that knowledge.
You aren’t supposed to be able to open the safe until you have spoken to the art dealer and you only do that in the House of Pleasure quest. I’m also not sure if you will even be able to open it until you have spoken to him, be sure to leave a comment below if you have tried before speaking to the art dealer.
There is a visual version of this guide at the end of this guide.
When you speak to the art dealer just keep electrocuting him until a conversation option pops up where you ask for the combination.
You can open the safe and loot it and still turn in the optional quest to Slackjaw and get your non-lethal elimination.
auluftwaffles.com, short video game guides 
I tried 138 before speaking and it worked
its 879 bros
696 worked
Good way of telling, and good piece of writing to get
data about my presentation topic, which i am going to convey in school.
Way cool! Some very valid points! I appreciate you writing this post and also the rest of the
website is really good.
696 worked firs
Did you all get the code from the Internet without talking to slackjaw or art dealer? Cuz I found a number 167 on a basket to the left of the safe but it doesn’t work. Just wondering if any of you got the combo from in the game without talking to those two.
i just commented earlier and it said May 13, 2013 at 5:44 pm… but the time is wrong. i commented at 09.16am May 13, 2013..i tried 696 first without talking to slackjaw and it worked…. im going to start new episode to see if the code is the same each time,…Karl Deeos Denno. fasebuk me. humberside UK. thanks.
The code is 138,696,or 879
So i killed slack jaw, didn’t talk to art dealer before either. Maybe some versions of each console have different codes?
You can open the safe before you talk to him
The safe can be opened before meeting the art dealer. Thanks for the combo!
Xbox. no talking to dealer, and no Slackjaw yet. 696 worked for me on Xbox. I killed the 2 in the mission, and likewise couldn’t figure out how I failed a side mission I didn’t even know about (meaning the art dealer/slackjaw combo)
696 worked for me on xbox but didnt talk to art dealer only slackjaw. if i get the combo off the art dealer do you still have to kill the brothers??????
by the way , why is there not much ammo or bolts around? very little… any cheats for this game??
I am playing the game on xbox 360 and 879 worked without talking to art dealer.
yea 879 worked on my ps3
879 worked for me as well
Im on a PC
Didnt talk to the art dealer!
Thanks!
During ‘House Of Pleasure’, I went to the Art Dealer’s house before speaking to Slackjaw and before speaking to the Art Dealer, and I was able to use the code 879 to open the safe.
For all of this talk of different codes, nobody is mentioning their platform: there seems to be 3 ‘working’ codes, and the game is out on 3 platforms… I am playing on a PC. My money’s on 138 being the X360 code…
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6… whatever it was.. works for me did talk to slacky-J .. wtf is an “art dealer” we snort art now yes? woot
879 worked for me. Thanks!
I tried it before the art dealer, did not work.
It worked for me with those num. I was on my way the cathouse so I haven’t talked to art dealer yet,
Tried on my way to the brothel. No luck.
you have to do the side quests for slackjaw in order for it to work
Please tell me where the safe is
ya i got it with 879 also without speaking to slackjawk or art dealer also. might depend on how many u kill and how many u knock out and where you are in your progress. just a thought. only took 3 tries from post with the most probabilities for me to get it. happened to be the 3rd one
Possible Comb. seem to be 138, 696, and 879.
I got in after talking to Slackjaw – but without talking to the Art Dealer – and used 696 to get in.
i dindt talk to the guy but it worked with me with the code 879
Yes, I spoke to Slackjaw about the favour he is giving me if I could get him the safe combination (after I delivered him his missing crew) and on my way to The Cat House I stopped by the art dealer’s place and use the 879 combination to enter. The other two combinations above would not work if you haven’t talk to the art dealer first but 879 worked for me. Tried 138 and 696 does not budge.
879 for me
no speaky Slackjaw, no speaky art dealer
Have to talk to the art dealer first
It does open before you talk to him but the code changes from game to game my friend and i went thru all the codes from 000 to 627 in order to open it enjoy
It does
Yeah you cannot open it b4 talking to him. You put in the code but it doesn’t work
Ok I haven’t spoke to the art dealer and the code I used is 138 and it worked for me
You gotta speak first wont work
138 is not the code. It is different for everyone so you have to actually find him and get the code. My code was 696
i got it at 696, and haven’t talked to the dealer yet. i guess there’s just a bunch of codes that could work depending on maybe how you’ve played? dunno
i used 138 and it worked fine
So when I was in the HOP,a prompt came up when I assassinated one of the twins in the steam room that x-ed out the safe quest.I went back to the safe after rescuing Emily and used the suggested “138” combination,and it worked.
Ohai, i did it after talking with him and the code was 696 for me aswell, like one of the other comments here, so i doubt its totally random, and you might just want to try either 138 or 696 (although might still not be it, i dunno)^^
Yeah you can open it before speaking to the art dealer. Just done it
The combination for me was 696, so I’m thinking it changes each time. As for whether or not you’re physically able to guess the combination and get in before talking to the guy…well if you want to potentially go through all 999 combinations be my guest.
The universal combination code for all the safes is “google” like my man below said lol …he is actually I and vise versa I ask he! MindFxxx!
I jus opened the safe prior to talking to the dealer or slackjaws quest. I had been searching the house for like an hour for a clue and was like Fxxx this I’ma google it…. And walla open-sesame
just tried to open the safe before talking to him and it just said I needed the art dealers safe combo
I didn’t go for the optional Slackjaw quest and when I questioned the dealer in the House of Pleasure I never got the option to ask for the safe combo. Looks like you have to know about the safe before you kill the poor guy or you can’t get in.
879
no speaky Slackjaw, no speaky art dealer