Here is the full list of all 57 Trigger Witch achievements.
Beat the Stock Gauntlet and join The Clip
Complete the Firearm Foundry
Complete the Shimmer Lode Mine
Complete the Snapfrost Dungeon
Receive the Norsou Potion
Escape the Nuxvarr cell
Complete the Sky Pavilion
Complete the Old Nux Castle
Embrace the power of magic
Defeat the Man in Black
Finish the game
Catch up with all your old friends and acquaintances
Receive your first weapon from the Ordnance Rift
Unlock the Battle Blaster
Unlock the Mortar Launcher
Unlock the Dual Mini Blasters
Unlock the Fire Lance
Unlock the Heavy Blaster
Unlock the Telescopic Shooter
Unlock the Thunderer
Unlock the mysterious firearm
Complete your firearm collection
Defeat 500 enemies
Empty a full clip of the dual mini blasters without missing an enemy
Spread fire between 20 enemies with the fire-lance
Kill 3 enemies at once with the telescopic shooter
Kill 10 enemies with a single clip from the Heavy Blaster
Kill 4 enemies with 4 different weapons in ten seconds
Beat the Stock Gauntlet time trial with more than 15 seconds left
Travel 500 metres by conveyor belt
Kill 10 enemies by wall bouncing
Make 5 enemies die from fire traps
Make 10 enemies fall to their untimely death
Kill 10 enemies hidden by darkness in the Old Nux Castle
Attempt the Arena Challenge
Score more than 5000 in the Arena Challenge
Score more than 10000 in the Arena Challenge
Collect 10000 gems
Spend 10000 gems
Collect your first weapon part
Collect all weapon parts
Fully upgrade a weapon
Fully upgrade 4 weapons
Read the full history of the Great Trigger in The Chamber
Use the Wayfarer's Stone
Talk to every business owner
Talk to villagers 10 times
Collect every map
Uncovered every area in Evertonia
Use teleporters 10 times
Complete each broomstick section
Consume 25 health vials
Impress The Gambler
Shoot into the Ordnance Rift
Shoot your firearm inside your house
Kill 25 enemies with gore mode off
Kill 25 enemies without the laser sight