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