Here is the full list of all 34 BanHammer achievements.
Owned all guns
Own auto shotgun
Unlock Elfire
Unlock Tomz Shark
Craft 5 times
Complete All Quests
Kill 100 shotgun2
Kill 100 BH smg
Kill 100 Sniper 2
Kill 100 Sniper 1
Kill 100 shotgun1
Kill 100 Chainsaw
Reach Level 10
Unlock All Stories
Kill 100 BH Heavy
Kill 100 saw
kill 100 axe
play with a second player
Kill 100 knife
Own tactical shotGun
rescuse 50 animals
Kill BH Jax Thrasher
Destroy 20 bunkers
Own BanHammer
Craft 1 time
Kill 100 Hammers
play with a companion
Own Plasma Rifle
Own Socolala shotGun
Reach Level 5
Kill Boss Chainsaw
Kill Boxer 02
Kill Boxer 01
Reach Level 3