Here is the full list of all 26 Pound of Ground achievements.
Find the guitar case.
With a handgun kill 6 zombies without reloading.
Locate your red car.
Kill 4 zombies with a single crossbow shot.
Kill at least 10 zombies by shooting the explosive barrel.
Tune up your car to the max.
Perform a car jump over more than 172m.
Make a zombie fly over 33m with your baseball bat.
Kill 15 zombies within 25 seconds using your firearms only.
Make the zombies fly over the total of 1212m with your baseball bat.
Hit the speedometer limit.
Kill 5 hyenas with a dynamite.
Kill 911 zombies with your weapons or your car.
Perform car jumps with total distance of 3.14159265 km.
Kill 66 stunned zombies with your baseball bat.
Collect 1111 coins.
Run 192 zombies over with your car.
Blow up the first generator on the farm without killing ANY zombies on the way.
Kill 68 zombies using any weapons without curing yourself.
Reach the game's end within 5 minutes. Yes, MINUTES!
Clear the Airport location and save all the hotties!
Exterminate the Mafia family.
Find the Indian drug dealer.
Finish the Game on Hard Difficulty. Don't be a wimp!
Fight your way through the first underground while using only the baseball bat.
Throw 26 dead zombies under water.