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