Here is the full list of all 18 Hollow 2 achievements.
Kill 50 wantons
Kill 30 buzzers
Survive through Sara's surprise
Escape cable maze
Collect all weapons
Kill 10 dogs
Kill 20 explosive enemies
Kill Sara
Reach the planet
Survive fight with Reaper
Kill first Puker
Kill Armored Wanton
Destroy 10 barrels
Get catched by Reaper
Die 10 times
Kill 20 shooting wantons
Use every power-up
Visit shop 10 times