Here is the full list of all 50 Rise of Nightmares achievements worth 1,000 gamerscore.
Cleared the main game on the "Humane" difficulty level.
Found all of the Detective's Tapes.
Defeated at least 20 creatures with a spear trap.
Survived the Endless Nightmare.
Obtained an A-Rank in Act 10, Scene 2.
Defeated at least 20 creatures using spiked walls.
Defeated at least 100 creatures with a powered weapon.
Defeated at least 30 creatures with explosives.
Defeated at least 20 creatures with the slicer.
Obtained an A-Rank in Act 10, Scene 3.
Obtained every type of weapon.
Defeated at least 100 creatures with a scissor-type weapon.
Obtained an A-Rank in Act 10, Scene 1.
Defeated at least 50 creatures using a knife.
Cleared the main game on the "Torture" difficulty level.
Discovered all "Secret Events."
Defeated at least 100 creatures with Ernst's chains.
Defeated at least 100 creatures with Azoth.
Obtained all Tarot Cards.
Defeated at least 50 creatures with a pipe-like weapon.
Defeated at least 50 creatures using arm weapons dropped by creatures.
Defeated at least 50 creatures with a fist-type weapon.
Defeated at least 50 creatures using test tubes.
Cleared the main game on the "No Mercy" difficulty level.
Cleared Act 8.
Defeated at least 500 creatures.
Cleared Act 7.
Defeated every type of creature.
Cleared Act 6.
Defeated at least 50 creatures using only punches and kicks.
Performed at least 50 dodge gestures in battle.
Cleared Act 5.
Cleared Act 4.
Beheaded 50 creatures.
Defeated at least three creatures in one swing.
Kicked open a door.
Defeated at least 50 creatures with a wood-cutting weapon.
Cleared Act 3.
Sliced off three creature body parts without a powered weapon, leaving the creature alive.
Defeated at least 100 creatures.
Cleared Act 2.
Found a Tarot Card for the first time.
Cleared Act 1.
Found a Detective's Tape for the first time.
Discovered your first "Secret Event."
Cleared Act 0.
Defeated your first creature.
Used a gesture to operate an object for the first time.
Began the Nightmare.
This is a secret achievement. Unlock it to find out more about it.