Here is the full list of all 25 We Are Terror: The First Days achievements. It takes around 0-1 hour to unlock all of the achievements.
Complete chapter 4 against the will of your allies.
Lose Chapter 4 by abandoning the base
Lose chapter 4 but survive it.
Lose Chapter 4 by dying alone in a blaze of glory
Complete Chapter 4
Complete Chapter 4 and nothing could have gone better.
Lose Chapter 4 by getting everyone killed.
Complete Chapter 3 and save Jones.
Complete Chapter 3 but let everyone else die.
Fail Chapter 3 by getting every single person killed.
Fail chapter 3 but save Higgins, Edwards and Phillips.
Fail chapter 3 but don't die. Become a werewolf.
Complete Chapter 3 and nothing could have gone better.
Complete Chapter 3
Complete chapter 2 with a really bad war strategy
Complete chapter 2 but leave the laurels to another...
Complete Chapter 2 and nothing could have gone better
Complete Chapter 2 with the world possible outcome
Complete Chapter 2
Manage to die in Chapter 2
Lose Chapter 1 by causing everyone to die.
Finish Chapter 1 with Phillips not liking you.
Lose Chapter 1 but Survive
Finish Chapter 1 with Phillip's respect.
Complete Chapter 1