You're right. I'm updating it so that "complete" is earned when beating the game with any ending, and you'll have to complete all 3 to get the other achievement.
I don't understand why people are complaining about the whole Shift+A to minijump thing, it's not even like it's an awkward key combination. Also, after a bit of practice, those ladder sections aren't even that hard.
 "Several Journeys of Reemus Chapter 4 Beastly Blackhole of Bureaucracy"){kind=icon}
 "Raider: Episode 2"){kind=icon}
 "Boxhead: The Zombie Wars"){kind=icon}
You're right. I'm updating it so that "complete" is earned when beating the game with any ending, and you'll have to complete all 3 to get the other achievement.