For all achievements related to objects Shards, you can use this incredible achievement guide made by Saeko:
http://steamcommunity.com/sharedfiles/filedetails/?id=159801... 
1)
Projectile Saliva!: Ride a
camel and use the "spit" option.
2)
Don't Bug Me!: Use
bug spray on a
wasp.
3)
You Say Potato, I say Projectile!: Use a
potato cannon and attack something.
4)
Tank Commander!: Ride a
tank and attack something.
5)
Boom Goes the...: Interact with
dynamite.
6)
Tanks for Playing!: Hit a
tank with an
anti-tank grenade.
7)
Pyrotechnically Awesome!: Interact with a
firecracker.
8)
I'd Stake Your Life on It!: Attack a
vampire with a
stake.
9)
Poke Em With the Sparky End!: Use a
cattle prod on a
cow.
10)
Timber!: Use a
chainsaw on a
tree.
11)
Bang Bang!: Create a
silver hammer.
12)
Nice and Toasty!: Use a
flame thrower.
13)
At Home on the Range!: Create a
sniper and a
gun range.
14)
Don't Cross Me!: Use a
crossbow.
15)
Love Struck!: Use
cupids bow.
16)
Holier Than Thou!: Use
holy water on a
demon.
17)
Nailed it!: Use a
nail gun.
18)
Sweet Dreams!: Attack someone with a
tranquilizer gun.
19)
You Summoned?: Use the
necronomicon.
20)
I'm a Wizard!: Use the
magic wand on something.
21)
Ouch My Eye!: Attack a
cyclops with a
lance.
22)
Foiled Again!: Attack a
fencer with a
foil (weapon).
23)
Roshambo!: Use
paper on
rock24)
I Can Shoot!: Use a
sniper rifle on a
can from a distance.
25)
William Tell!: Attack an
apple with a
bow.
26)
Free Man!: Use a
crowbar on a
crate.
Again, All credit goes to Saeko!
Thanks!