Here is the full list of all 28 Organ Trail: Director's Cut achievements.
Use 50 medkits
[Secret] sacrifices himself for the greater good.
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.
Beat the game without trading anything on the road.
Kill all the other members of your party while they are healthy.
Make it to Safe Haven with George Romero in your party.
Kill "Ryan" at the start of a game.
Become a zombie.
The station wagon breaks down 4 times during the trip.
Beat the game on hard.
Make it to Safe Heaven without starting with any food or buying any food.
Kill 500 zombies
Don't pull the trigger
Fully upgrade your station wagon.
Survive all 3 boss encounters.
Put down an infected party member who has passed out.
Have $1000 on you.
Always choose to shoot your way through zombie hoardes.
Make it to Safe Heaven without starting with any money or selling anything.
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.
Investigate 30 points of interest.
Beat the game five times.