"Destroy Spawners By Impact" Means: Ram Through Them With A Car Or Tank.
- Tank Is Waaaaaay Better.
- Car Does Not Destroy Them In One Hit, And You Will Have To Back Up To Hit It Again, While Being Swarmed.
Destroying 10 Spawners This Way Unlocks This Achievement.*
Good Luck!
*Side Note: Can Not Be Done On Peaceful Mode, As There Are No Alien Spawners.