The Hellraid Add-on for Dying Light has 10 achievements.
Kill 50 skeletons with fall damage
Finish Hellraid with only one life left and 0 medkits
Reach level 10 Hellraid rank
Put Clavis fragments into Arena
Earn more than 3000 coins in one run
Finish Hellraid on Nightmare
Collect all 10 notes
Finish Hellraid under 30 min