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Rage: Train with Bly at every opportunty. She’ll teach you her unique ability, Rage, which will earn you the achievement.
Lab Rat. You’ll need a lot of Academics for this. While searching the military compound after you or your RO were captured, search the science labs (I think you can only do this if you’re rescuing your RO, not if you were captured yourself) and you’ll find Dr.Leaman there. She’ll assume that you’re a new assistant and ask for your help. If you have enough Academics, she’ll be impressed by your intelligence and explain her experiments which will give you the achievement.
A Bloody Revenge: For this one, you’ll need a LOT of combat. During the finale, after Elan shows up but right before you’re trapped in the decontamination center, when asked what you will do if it’s a trap, say that you’ll fight your way out if necessary. If you have enough Combat, you’ll be able to defeat the guards when they attack you.
Afterwards you’re going to need even more Combat because you’ll have to select to fight Williams to the death and he is a tough cookie.
Silver Tongue: This one is the complete opposite of the one above and one of the hardest ones. First, gain Diplomacy whenever you can. Now, when you go to rescue your RO or are rescued yourself, make sure to do it as quickly as possible, do not meander around the base, go straight to your target.
The next important bit is when you’re ambushed in the decontamination area. You’ll have to defeat the guards like above but you must not attack Williams or accuse him of being traitor. Pick all options that seem to agree with him. And this is why you needed to hurry up. If you took too long, guards will show up and attack Williams and you won’t get the achievement. However, if you did everything right, you’ll be able to join Williams here in his mad quest to “cure” werewolfkind. Williams will join your side of the battle as Elan from here on out.
Later, if you win the battle, Haken will reveal that he knows that Elan is Williams and attack you with his pack. To earn the achievement, you must convince him to let you and Williams go in peace hence why you needed all that Diplomacy.
The Cure: For this one, you’ll need Academics. When Bly is hunted by the military, choose to search for her with Jolon in the ruined area of Haven. When you encounter Rost, if you have high enough Academics, you’ll be able to promise him that you’ll find a cure for his Feral state. If you are taken to Sonoma’s camp during the epilogue, Rost will be there and you’ll get the achievement.
Survivor: You’ll need to personally defeat Williams in his UberWolf form during the final battle but NOT kill him. If you kill him, you’ll get “Patricide” instead. Rage will actually help you here so long as you don’t lose control.
Pacifist: To get this achievement, you need to finish the game without killing a single person. There are a lot of opportunities to kill during the game so I can’t go into detail, sorry. Rule of thumb, avoid combat as much as possible.
