i played tho DM twice and i killed dean......is there a way to let him live? if so tell me what conversation options i pick

The way I got him to survive in the end was to avoid any dialogue that is rude or confrontational. I also avoided speech checks with him (at least until you meet him for the last time in the tampico, those speech checks are safe in my experience) Just do everything he says, always be willing to cooperate and just don't say anything snide.

I can't tell you the exact ones I picked, but it's fairly obvious which ones are you being mean to him and like I said ignore the speech checks until the tampico just in case. Some of them seemed alright to choose but I didn't want to risk it.

At Tampico I believe it reflects on everything you said to him beforehand so if you were a jerk to him, hes gonna try to kill you, but I kept him alive without even trying lol.

You can let him live. It all depends on what you say to him before hand. If you're a real [censored], he'll try to kill you. If your nice and buddy buddy with him, he won't.

Also he helps out a bit, A Bit, with the confrontation with Elijah.

Personally I found him funny but I wouldn't feel bad for killing him due to all that crap he did with messing around with Sinclair and Vera. A Capital "D" [censored].
I let him live and had no qulams with him.

Also the Explosives check at the beginning of meeting him is safe so are the science/repair/and high speech checks to convince him to stay with the holograms.

As one poster suggested avoid any mean or rude comments, always be compliant and agreeable and you should be fine. The speach checks are ok to use provided they again are compliant and agree able. I always use speech checks when presented (seems a waste to make a high speech character then avoid the extra dialog that it opens up) provided i was not rude or confrontitational and you should have no problem, or at least i did not.

Hope this helps
Asai

Strangely I liked him
He resembles me in many ways

Don't force him to help you when recruiting him, don't threaten him to break his legs in the second stage of DLC and he should be friendlier to you.

I'm still not seeing anyone giving examples of which dialogue options to pick. I went through being as nice as possible, and I had to kill him.

Dont open any of his stashes when he's your companion either.

First conversation: Say you'll be his partner. Don't barter your way out, or threaten him.

Second conversation: Get him two holograms, then convince him to stay using any associated skills, Speech, repair, etc.

Last conversation: Most of it is completely fine, just don't be an ass.

You most likely threatened him or used barter the first time you met him, thats why you have to kill him.

I had this problem once out of 7 times beating Dead money. But I think the problem was, once in the casino, I talked to Dean first instead of using my usual Christine,Dog/God,Dean cycle. I dont know if that had anything to do with, but I talk to Dean last everytime after, and the problem never occured again. It made me mad, since I like to keep all my companions alive, and get them to let go. I merged Dog/god, got Christine to give up hunting Elijah, and told Dean to forget about the Madre. I prefer happy endings.

Dean Domino had a bit of a Stewie from Family Guy persona going on....wonder if that was coincidental or planned by the developers?

I did it once, but my 2nd time around I don't know what happened. I was friendly, never tried to insult him, hell I even got the Holograms working. Perhaps the stashes had an impact?

I collected at least 7 of those things and we were the bestest of friends at the end.

Maybe you did a speech challenge that seemed okay but for whatever reason "bruised his ego"?

I had a 100 speech, it must have been something I said then :/

can i open them if he isent my compainion at the time (like i requited him but i had DOG atm)