Here is the full list of all 24 The Light Brigade achievements.
Hold onto 1,000 coins at once during a run.
Try to fire your weapon without first reloading it.
Defeat the second boss.
Spend 1,000 gold at a store.
Defeat the first boss.
Rescue an ally Light Brigade soldier out on a run.
Cock an ally Light Brigade soldier's rifle.
Land 250 gunshots. (accumulated)
Reload 100 times. (accumulated)
Travel 1,000 meters. (accumulated)
Use an enemy's dropped weapon to kill another enemy.
After death, find your ghost and pray to it.
Pray to the Mother.
Die and be revived for the first time.
Finish your first run, start to finish.
Land 250 headshots. (accumulated)
Never miss a shot during a fully completed run.
Every single shot during a fully completed run is a headshot.
Use the wishing well.
Kill an enemy sniper from far away.
Kill an enemy bomber using a grenade.
Kill an enemy priest using magic.
Defeat the Father.
Have a hypnotized enemy kill another enemy.