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