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