Here is the full list of all 52 Warhammer 40,000: Carnage Champions achievements.
Cause 100 Total Damage
Cause 1000 Total Damage
Cause 10,000 Total Damage
Defeat 20 Squigs
Defeat a Nob with a Jet-pack slam attack
Find and defeat an Ork Nob
Find and defeat 100 Ork Nobs
Complete a Verthand City mission
Complete 12 Verthand Ruins missions
Complete 20 Verthand City missions
Defeat a Mega Dredd
Defeat a Mega Dredd with any Melee Weapon
Defeat the Mega-Dredd a second time
Destroy 1000 Walls
Defeat 20 Orks with a Chainsword
Have your Support defeat 100 enemies for you
Defeat 20 enemies with a Combat Knife
Defeat 60 enemies with a Lightning Claw
Defeat 60 enemies with a Power Fist
Defeat 60 enemies with a Power Maul
Defeat 60 enemies with a Power Sword
Defeat 60 enemies with a Power Axe
Defeat 60 enemies with a Whip
Cause 500 Total Damage with any Power Weapon
Defeat 5 enemies with fire damage
Defeat 25 enemies with fire damage
Defeat 100 enemies with fire damage
Defeat 500 enemies with fire damage
Defeat 5 enemies with shock damage
Defeat 25 enemies with shock damage
Defeat 100 enemies with shock damage
Defeat 500 enemies with shock damage
Defeat 5 enemies with bleed damage
Defeat 25 enemies with bleeding damage
Defeat 100 enemies with bleeding damage
Defeat 500 enemies with bleeding damage
Defeat 15 enemies with grenades
Cause 10,000 total damage with grenades
Defeat 5 enemies with Rage Burst damage
Deal 10,000 total damage with Rage Burst
Complete Heart's Darkness on Bronze difficulty twice
Defeat Heart's Darkness on Silver difficulty twice
Complete Heart's Darkness on Gold difficulty twice
Complete Barracks: P.D.F. on Bronze difficulty twice
Complete Barracks P.D.F. on Silver difficulty twice
Complete Barracks P.D.F. on Gold difficulty twice
Complete To Ejudnir's Reach on Bronze difficulty twice
Complete To Ejudnir's Reach on Silver difficulty twice
Complete To Ejudnir's Reach on Gold difficulty twice
Complete Gork's Rok: The Fortress on Bronze difficulty twice
Complete Gork's Rok: The Fortress on Silver difficulty twice
Defeat Gork's Rok: The Fortress on Gold difficulty twice