Here is the full list of all 28 Organ Trail: Director's Cut achievements.
Make it to Safe Heaven without starting with any food or buying any food.
Always choose to shoot your way through zombie hoardes.
Fully upgrade your station wagon.
Have $1000 on you.
The station wagon breaks down 4 times during the trip.
Find your own grave.
Someone died of dysentery.
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.
Make it to Safe Heaven without starting with any money or selling anything.
Kill 500 zombies
Kill 25 zombies without missing a shot.
Don't pull the trigger
Put down an infected party member who has passed out.
Successfully forde a horde of zombies 3 times.
Stop at 50 tombstones.
Beat the game on hard.
Scavenge more than double the supplies you can carry.
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.
Use 50 medkits
Get attacked by zombies 20 times during scavenging.
Beat the game without trading anything on the road.
Become a zombie.
Beat the game five times.