Here is the full list of all 28 Organ Trail: Director's Cut achievements.
[Secret] sacrifices himself for the greater good.
Use 50 medkits
The station wagon breaks down 4 times during the trip.
Become a zombie.
Get attacked by zombies 20 times during scavenging.
Make it to Safe Heaven without starting with any money or selling anything.
Make it to Safe Heaven without starting with any food or buying any food.
Have $1000 on you.
Scavenge more than double the supplies you can carry.
Beat the game without trading anything on the road.
Make it to Safe Haven with George Romero in your party.
Successfully forde a horde of zombies 3 times.
Always choose to shoot your way through zombie hoardes.
Fully upgrade your station wagon.
Kill 500 zombies
Don't pull the trigger
Survive all 3 boss encounters.
Kill 25 zombies without missing a shot.
Find your own grave.
Kill "Ryan" at the start of a game.
Kill all the other members of your party while they are healthy.
Put down an infected party member who has passed out.
Stop at 50 tombstones.
Beat the game on hard.
Investigate 30 points of interest.
Someone died of dysentery.
Your party dead, you made it to Safe Heaven alone.
Beat the game five times.