Here is the full list of all 27 Tommyknockers achievements.
Hit a Tommyknocker with a rock.
Hit a moving Tommyknocker with a rock.
Hit a Tommyknocker with a rock while in the dark.
Hit two different Tommyknockers with the same rock.
Hit a charging Tommyknocker with a rock.
Deploy a bear trap.
Kill a Tommyknocker with a rock.
Kill a Tommyknocker with a bear trap.
Survive the first night.
Survive the second night.
Survive the third night.
Survive the fourth night.
Survive the fifth night.
Survive the sixth night.
Survive the seventh night.
Survive any night entirely in the dark.
Survive any night without throwing any rocks.
Survive any night without losing any gold.
Hit a lifetime total of 10 Tommyknockers with a rock.
Hit a lifetime total of 50 Tommyknockers with a rock.
Hit a lifetime total of 100 Tommyknockers with a rock.
Kill a lifetime total of 10 Tommyknockers.
Kill a lifetime total of 50 Tommyknockers.
Kill a lifetime total of 100 Tommyknockers.
Kill a lifetime total of 10 Tommyknockers with bear traps.
Kill a lifetime total of 50 Tommyknockers with bear traps.
Kill a lifetime total of 100 Tommyknockers with bear traps.