Use a hammer to crack a nut is one of 28 Achievements in The Respawnables.
The description says Kill 25 enemies with the Howitzer Gun.
This Achievement is earned after getting 25 kills with the howitzer gun.
Note that only enemies in the Mission Mode count as enemies.
Enemies in Multiplayer do not work for this Achievement.
The reward for this achievement are 5 Score Points (when achieved during a match).
The Phrase ItselfEdit
"Use a hammer to crack a nut" is a distorted version of the original phrase "Use a sledgehammer to crack a nut". This idiom can be applied to a situation when a very forceful solution is applied to a simple problem, such as firing 6 shells of a Howitzer Gun each at 25 unarmored targets.
Tips & TricksEdit
A detailed guide about using the Howitzer gun can be found here