The Sad Egg collection (Image via Roblox) Sad Eggs are part of an Exclusive Egg set in Pet Simulator 99. They act similarly to regular Eggs whose hatches utilize Robux instead of Coins.

The Sad ending (Image via Roblox || Jamie the OK Gamer on YouTube) The Sad ending is special because it alters the game world after achieving it, making it one of a kind.