Very quick hotfix here, patched three achievements that weren't functioning as intended. Spoiler-free notes below:
Just the Two of Us could only be earned on one of three worldstates where it should have been achievable.
I'm not here to make friends was achievable, but didn't have correct conditional logic, making it harder get.
Evil Has Triumphed was unachievable. (Oops)
I'm hoping to fix the bugged Episode 1 Achievements for players who carried over saved states later this week, but am waiting on a response to a support ticket w/ Valve before proceeding with a fix.