How do I do the Dead Eels non-lethally?

[Jón]

?

[Daddy Kaneki]

How do you any part of this game non-lethally?

If you mean not killing any of the Dead Eels, then you just need to be quick and silent. In my first playthrough, I was really afraid of interacting with the Dead Eels as to prevent any problems with Lizzy, that I didn't even choke any of them. Just stick to the rooftops and check their lines of sight and it'll be easy to stay unseen.

[Count Smashula]

if you want an easy time collecting and exploring in the mission I'm assuming you are in after breaking lizzy out, is to just do the story until you meet the geezer. just find the guy that lizzy wants to get rid of, and kill him or knock him out, then the eels will be all piece and quiet without attacking you (you can actually betray them and lizzy without breaking the mission).

after that, you can meet up with the geezer and the hatters will leave you alone aswell. same rules apply as with the eels.

sorry if I made some spoilers for you, but I hope it helps.

[Jón]

I've already knocked out Trimble (or whatever his face is)- and now, by the looks of it, my only option is to kill the Geezer- and, by extension, everyone else in the factory (through the gas thing)

so yeah..

[Daddy Kaneki]

You don't have to kill Geezer to finish the mission. Unless you attacked Trimble before he gave you the code to the basement.

[Jón]

Yeah, well, I did so on instinct. Best I could do was choke everyone and move them out of the building, before I killed him.

[Count Smashula]

well, now you have to talk to the geezer and make a deal with him, so good luck! (trying not to spoil too much for ya) also, the hatters will most likely be hostile with you, so heads up for that...