Full list of all 22 West of Dead achievements worth 1,000 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox One.
Completed the Crypt
Complete the Hunt
Complete the Mines
Complete the Bayou
Complete the Canyon
Complete the Farm
Complete the Town
Complete the Graveyard
Complete the Church
Defeat the Preacher
Defeated the Preacher (II)
Defeated Injustice (Preacher III)
Banish Injustice
Find the first rune
Find the second rune
Find the third rune
Help first lost soul
Helped 5 lost souls
Helped 20 lost souls
Defeat first Outlaw
Defeated 5 Outlaws
Defeated 20 Outlaws