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