Here is the full list of all 11 SPIRITUS achievements.
Take a monster's head clean off!
Sometimes death is inevitable...
You always remember your first kill.
Survived the horde and reached the lab!
Start a new game
Defeat the first boss.
Survive the subway and board the train
Reach the finale.
Equipped to deal with the worst.
You can decimate everything now.
Find the secret plans.