Sweet Naptime is an Achievement in Halo Wars that is obtained when the player puts every colony in hibernation at the same time on the The Flood and is worth 5 Gamerpoints.
- Play the mission on Easy difficulty with the Catch, Sugar Cookies, Pain Train, Bountiful Harvest and Emperor Skulls active.
- Send a pair of Gauss Warthogs to each of the colonies and kill them to put them into hibernation.
- Do this for each of the colonies. They respawn in 4 minutes.
- You can choose to lock down a Cobra outside each colony to permanently weaken the Proto Gravemind and have time to build an army to defeat it.
- The achievement may be a reference to Red vs. Blue in which Caboose has an obsession with "naptime" and sleeping in general.