This achievement is relatively simple. Just go into Infinity Time, get to wave 5, vanquish the king, or have a friend do it. Just be in the game while he is vanquished. A good strategy that should be used throughout Infinity Time is keeping Time Shards on the ground until you need them. The won't vanish and if you go to the next area they will automatically be collected.
- The object shown in the achievement's icon is actually the Blue Gnome King's cracked googles. This also applies to King of Spring, King of Autumn and King of Summer.
- However, the background for this achievement's icon is blue, while the background for the other mentioned achievements are different.