Mindless

Green/Red biased- talk to people from one side and then go get the sword from the other and kill the side you talked to. Somehow late- start killing people, but then change your mind and get in the boat and leave. Spoilers for the other endings are in the other comments.

Coward - turn around and leave immediately.
Trouble avoider - turn around and leave without speaking to anyone except the grey man.
Balanced - talk to at least one person of each tribe then leave.
Worker - talk to a few people from one tribe, but not the other, then leave.
Green/Red mindless - ???
Green/Red biased - ???
For the Red/Green - acquire sword, get killed by opposing tribe.
Last minute - leave after acquiring a sword but before killing any of the opposing tribe.
Somehow late - I'm guessing you get this by killing all of one tribe and then leaving but I haven't managed it yet because this game has a skill component.

for the love of ever living piles of fetid horse dung PLEASE let me skip dialogue!

to get worker u must talk with 1 or 2 people of one tribe, (not the king) and then go

This game was intellectual art.