Here is the full list of all 25 Zombie Exodus achievements.
High humanity.
High allegiance.
Ending 8 - Develop the Vaccine
Leave the cathedral solo.
Low humanity.
High morale.
Best friend to all.
High dexterity.
High strength.
High intelligence.
High will.
High charisma.
High technical.
True romantic relationship.
Find all hidden weapons.
Ending 1 - The Summit
Ending 2 - BayTown
Ending 3 - New Command
Ending 4 - Hidden Bunker
Ending 5 - Become a Zombie
Ending 6 - Become a Raider
Ending 7 - The Chosen
Ending 9 - Settle in Temperance
End with all female survivors.
End with all male survivors.