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