Kingdom Come: Deliverance

This took awhile to figure out. You must be tired when you wait for the 2 days. In short you will never get this achievement if you boost your energy above 50. It needs to be below 50 and then you can use the wait timer.

It took about 5 in game days of just exploring waiting for the time to pass just for me to find out that the achievement isn't progressing because I was keeping my energy high.

The description for this achievement is incredibly misleading. The actual unlock condition is Have 50 energy or less for a total of 48 in-game hours (does not have to be in one sitting).

This means that achievement progress is cumulative, just like the other "starvation" and "stuffed" achievements. This ALSO means that if you have 50 energy or below and are sleeping to raise your energy, achievement progress will still be tracked even though you're sleeping.

So, simple enough, keep your energy below 50, spend some time reading books, doing quests in towns, stuff that doesn't require you to have a lot of energy. Don't be afraid to go sleep when energy drops low, on the contrary it's a great way to pass time for the achievement.

This is fairly self explanatory, but this is the most painful of the 3 'excess' achievements. In order to stay awake you will most certainly need the 'Insomniac' perk found under the Main Level section of the player menu, and it can't be unlocked until level 4.

Even after that make sure to have foods (or alcohol) on stand by with decent energy replenishment (press y in the menu to see an items effects). Try not to wait to much because I found it wasn't as effective as it should be (please comment and correct if you can just wait out the 48 hours). Just do lots of low stress, non-combat quests and activities until this is done.

Hope this helps,

Let's keep cheevin' together!